; HLPCLEAN
;---------------------------------------------------------------
;! Cleaning tasks  - internal help
;# TASK AP IMAGING OOP CALIBRATION INTERACTIVE TV-APPL
;-----------------------------------------------------------------------
;;  Copyright (C) 1995-1997, 2000
;;  Associated Universities, Inc. Washington DC, USA.
;;
;;  This program is free software; you can redistribute it and/or
;;  modify it under the terms of the GNU General Public License as
;;  published by the Free Software Foundation; either version 2 of
;;  the License, or (at your option) any later version.
;;
;;  This program is distributed in the hope that it will be useful,
;;  but WITHOUT ANY WARRANTY; without even the implied warranty of
;;  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;;  GNU General Public License for more details.
;;
;;  You should have received a copy of the GNU General Public
;;  License along with this program; if not, write to the Free
;;  Software Foundation, Inc., 675 Massachusetts Ave, Cambridge,
;;  MA 02139, USA.
;;
;;  Correspondence concerning AIPS should be addressed as follows:
;;         Internet email: aipsmail@nrao.edu.
;;         Postal address: AIPS Project Office
;;                         National Radio Astronomy Observatory
;;                         520 Edgemont Road
;;                         Charlottesville, VA 22903-2475 USA
;-----------------------------------------------------------------------
C-----------------------------------------------------------------------
OFFZOOM
This option resets any zoom factors and zoom center.  The image is
actually shown in zoom only when the menu selection is not going on.
Thus, the image is zoomed during cursor-value, Black-and-white and color
enhancement and window and box setting.
C-----------------------------------------------------------------------
OFFTRANS
This option turns of any black-and-white enhancements done in TVFIDDLE
or TVTRANSF.
C-----------------------------------------------------------------------
OFFCOLOR
This options turns of any color enhancements done in TVFIDDLE, TVPSEUDO,
or TVFLAME.  Has no effect if the image is in black and white.
C-----------------------------------------------------------------------
TVFIDDLE
This option allows you to set the zoom factor and center to blow up the
data plot for more accurate cursor positioning.  It also allows you to
alter the look-up-tables.  Button A selects image enhancement, altering
between black-and-white and the AIPS-standard color contours.  Button B
increments the zoom or resumes zoom-center mode, while button C
decrements the zoom or resumes zoom-center mode.  Button D ends the
enhancing and returns to the menu.  Instructions appear on the message
screen.
C-----------------------------------------------------------------------
TVTRAN
This option allows you to set the black-and-white transfer function
using the TV cursor to control intercept and slope.  Buttons A and B
turn a plot of the LUT on and off, button C reverses the sign of the
slope, and button D ends the enhancement and returns to the menu.
Instructions appear on the message screen.
C-----------------------------------------------------------------------
TVPSEUDO
This option allows you to set the color transfer function using the TV
cursor.  Button A loops through all possible RGB triangles, button B
selects a circle in hue (which is very useful for phase displays),
button C selects several color contours, and button D ends the
enhancement and returns to the menu.  As in AIPS, the TV cursor is used
to adjust the colors within the selected function.  Instructions appear
on the message screen.
C-----------------------------------------------------------------------
TVFLAME
This option allows you to set the color transfer function using the TV
cursor and a flame-like color scheme.  Buttons A and B cycle through the
sequence of all possible color combinations, while buttons C and D end
the enhancement and return to the menu.  The TV cursor X position
adjusts the image intensity at which the color turns more white, while
the Y position adjusts the way colors add (the gamma).  Instructions
appear on the message screen.
C-----------------------------------------------------------------------
TVZOOM
This option lets you set the TV zoom magnification factor and to set the
point about which the zoom takes place.  The cursor points at the zoom
center which will be  shifted to the center of the screen.  A hit on
buttons A or B increments the magnification factor and on button C
decrements the magnification factor in a circular fashion.  Hit button D
to exit.  Instructions appear on the message screen.
C-----------------------------------------------------------------------
CURVALUE
To perform an interactive display of the pixel locations and values of
the image visible on the TV.  The X and Y pixel coordinates, the pixel
value, and the units of the pixel value are displayed in TV graphics
channels 3 and 4 at the upper left of the display.  The cursor position
determine which pixel is shown.  Button D ends the display and returns
to the menu.  Instructions appear on the message screen.  The pixel
values are read from disk and hence preserve accuracy.
C-----------------------------------------------------------------------
SET WINDOW
This option allows you to set the visible window into the current field.
It must encompass all Clean boxes and the TV loading procedure will
choose pixel increments large enough to load the full image window.  You
may wish to use a smaller window - if it includes all Clean boxes - in
order to use smaller pixel increments and hence to see more detail. This
option is similar to TVWINDOW in AIPS.  Any button marks the BLC on the
image, switching you to setting TRC. Thereafter, buttons A and B switch
between setting BLC and TRC and buttons C and D set the window, reload
the image and return to the menu.  Instructions appear on the message
screen.  Note that the cursor position cannot be moved off the currently
visible image window.
C-----------------------------------------------------------------------
RESET WINDOW
This option lets you set the visible window into the current field to
include the whole field.  The image will be redisplayed using pixel
increments large enough to fit the full image into the TV memory (you
may have to increase the XAS window size to see it all - use F2).  You
may wish to do this to see the full image and/or to set a larger window
or larger Clean boxes than were available to you with the previous
window.
C-----------------------------------------------------------------------
TVBOX
This option lets you create up to 256 or more (up to 2048 if there are
fewer than 64 fields) Clean boxes to restrict the search for
components in the current field.  The boxes may be circular or
rectangular.  While setting the lower left corner (or circle center)
of each box for the first time, button A or B will mark the point and
switch to setting the upper right corner (or radius) of the box.  Button
C will switch between setting a rectangle and setting a circle and
button D will delete the current partial box (leaving zero or more
boxes) and return to the menu.  While setting the upper right corner
(or radius) re-setting the lower left or center, button A marks the
current point (corner, center, or radius) and switches to the opposite
point (e.g. BLC <-> TRC, center <-> radius).  Button B marks the
current point and switches to the next (new) box, button C marks the
current point and switches to a search mode leading to the resetting
of a previous box, and button D exits.  In search mode, move the
cursor to any lower left or upper right corner of any already set
rectangular box (or any center or any place on the circumference of an
already set circular box) and press button A or B to reset that point
or push button C to go on to the next box or button D to go back to
the menu.  The number of boxes is set by this function.  Instructions
appear on the message screen and the TV cursor cannot be moved to make
a box extend beyond the (full) TV window.  NOTE: function REBOX may be
used to reset the results if needed.
C-----------------------------------------------------------------------
REBOX
This option lets you create up to 256 or more (up to 2048 if there are
fewer than 64 fields) Clean boxes to restrict the search for components
in the current field.  The boxes may be circular or rectangular.
Unlike TVBOX, REBOX begins by displaying any current Clean boxes and
then goes into the search mode to revise the current Clean boxes.
While setting the lower left corner (or circle center) of each box for
the first time, button A or B will mark the point and switch to
setting the upper right corner (or radius) of the box.  Button C will
switch between setting a rectangle and setting a circle and button D
will delete the current partial box and return to the menu.  While
setting the upper right corner (or radius) re-setting the lower left or
center, button A marks the current point (corner, center, or radius) and
switches to the opposite point (BLC <-> TRC, center <-> radius).  Button
B marks the current point and switches to the next (new) box, button C
marks the current point and switches to a search mode leading to the
resetting of a previous box, and button D exits.  In search mode, move
the cursor to any lower left or upper right corner of any already set
rectangular box (or any center or any place on the circumference of an
already set circular box) and press button A or B to reset that point or
push button C to go on to the next box or button D to go back to the
menu.  The number of boxes is set by this function.  Instructions appear
on the message screen and the TV cursor cannot be moved to make a box
extend beyond the (full) TV window.  NOTE: function REBOX may be used to
reset the results if needed.
C-----------------------------------------------------------------------
CONTINUE CLEANING
This option allows you to resume the current Clean operation without
waiting for the time-out interval to expire.
C-----------------------------------------------------------------------
STOP CLEANING
This option allows you to request that the current Clean operation be
declared complete at this point.  Components will be restored to the
residual images (if requested) and the output images written.  If more
channels, self-cal loops or whatever are to be done, they will take
place as if the Clean had ended for normal reasons (iteration or flux
limits).
C-----------------------------------------------------------------------
ABORT TASK
This option allows you to request that the task finish as soon as
possible with an abnormal termination.
C-----------------------------------------------------------------------
TURN OFF DOTV
This option lets you turn off the display and interaction with the Clean
residual images.  It may be turned back on only with the TELL <taskname>
verb in AIPS.
C-----------------------------------------------------------------------
REMAKE IMAGES
This option allows you to have the task re-compute images of all fields
using the current residual uv data.  It will then re-display one of the
residual images (initially), but allow you to view all fields and to set
Clean windows for all fields.  This is important since the selection of
whcih field to do next is based on the maxima only in the Clean windows.
This option is offerred only when OVERLAP=2 and DO3DIMAG is true.
C-----------------------------------------------------------------------
SELECT FIELD  1
This option allows you to change from the currently displayed field to
the 1'st image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  2
This option allows you to change from the currently displayed field to
the 2'nd image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  3
This option allows you to change from the currently displayed field to
the 3'rd image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  4
This option allows you to change from the currently displayed field to
the 4'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  5
This option allows you to change from the currently displayed field to
the 5'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  6
This option allows you to change from the currently displayed field to
the 6'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  7
This option allows you to change from the currently displayed field to
the 7'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  8
This option allows you to change from the currently displayed field to
the 8'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  9
This option allows you to change from the currently displayed field to
the 9'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  10
This option allows you to change from the currently displayed field to
the 10'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  11
This option allows you to change from the currently displayed field to
the 11'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  12
This option allows you to change from the currently displayed field to
the 12'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  13
This option allows you to change from the currently displayed field to
the 13'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  14
This option allows you to change from the currently displayed field to
the 14'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  15
This option allows you to change from the currently displayed field to
the 15'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  16
This option allows you to change from the currently displayed field to
the 16'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  17
This option allows you to change from the currently displayed field to
the 17'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  18
This option allows you to change from the currently displayed field to
the 18'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  19
This option allows you to change from the currently displayed field to
the 19'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  20
This option allows you to change from the currently displayed field to
the 20'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  21
This option allows you to change from the currently displayed field to
the 21'st image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  22
This option allows you to change from the currently displayed field to
the 22'nd image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  23
This option allows you to change from the currently displayed field to
the 23'rd image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  24
This option allows you to change from the currently displayed field to
the 24'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  25
This option allows you to change from the currently displayed field to
the 25'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  26
This option allows you to change from the currently displayed field to
the 26'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  27
This option allows you to change from the currently displayed field to
the 27'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  28
This option allows you to change from the currently displayed field to
the 28'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  29
This option allows you to change from the currently displayed field to
the 29'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  30
This option allows you to change from the currently displayed field to
the 30'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  31
This option allows you to change from the currently displayed field to
the 31'st image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  32
This option allows you to change from the currently displayed field to
the 32'nd image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  33
This option allows you to change from the currently displayed field to
the 33'rd image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  34
This option allows you to change from the currently displayed field to
the 34'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  35
This option allows you to change from the currently displayed field to
the 35'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  36
This option allows you to change from the currently displayed field to
the 36'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  37
This option allows you to change from the currently displayed field to
the 37'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  38
This option allows you to change from the currently displayed field to
the 38'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  39
This option allows you to change from the currently displayed field to
the 39'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  40
This option allows you to change from the currently displayed field to
the 40'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  41
This option allows you to change from the currently displayed field to
the 41'st image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  42
This option allows you to change from the currently displayed field to
the 42'nd image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  43
This option allows you to change from the currently displayed field to
the 43'rd image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  44
This option allows you to change from the currently displayed field to
the 44'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  45
This option allows you to change from the currently displayed field to
the 45'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  46
This option allows you to change from the currently displayed field to
the 46'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  47
This option allows you to change from the currently displayed field to
the 47'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  48
This option allows you to change from the currently displayed field to
the 48'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  49
This option allows you to change from the currently displayed field to
the 49'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  50
This option allows you to change from the currently displayed field to
the 50'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  51
This option allows you to change from the currently displayed field to
the 51'st image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  52
This option allows you to change from the currently displayed field to
the 52'nd image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  53
This option allows you to change from the currently displayed field to
the 53'rd image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  54
This option allows you to change from the currently displayed field to
the 54'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  55
This option allows you to change from the currently displayed field to
the 55'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  56
This option allows you to change from the currently displayed field to
the 56'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  57
This option allows you to change from the currently displayed field to
the 57'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  58
This option allows you to change from the currently displayed field to
the 58'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  59
This option allows you to change from the currently displayed field to
the 59'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  60
This option allows you to change from the currently displayed field to
the 60'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  61
This option allows you to change from the currently displayed field to
the 61'st image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  62
This option allows you to change from the currently displayed field to
the 62'nd image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  63
This option allows you to change from the currently displayed field to
the 63'rd image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
SELECT FIELD  64
This option allows you to change from the currently displayed field to
the 64'th image field of the Clean.  The task will display only as many
of these select options as are useful.
C-----------------------------------------------------------------------
DISPLAY ONLY  1
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY  2
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY  3
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY  4
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY  5
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY  6
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY  7
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY  8
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY  9
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 10
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 11
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 12
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 13
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 14
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 15
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 16
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 17
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 18
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 19
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 20
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 21
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 22
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 23
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 24
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 25
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 26
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 27
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 28
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 29
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 30
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 31
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 32
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 33
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 34
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 35
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 36
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 37
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 38
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 39
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 40
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 41
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 42
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 43
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 44
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 45
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 46
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 47
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 48
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 49
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 50
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 51
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 52
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 53
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 54
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 55
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 56
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 57
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 58
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 59
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 60
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 61
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 62
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 63
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------
DISPLAY ONLY 64
This option is offered only when OVERLAP=2 and DO3DIMAG is true.  It is
simply to tell you which field is displayed and does nothing if selected
with Buttons A, B, or C.
C-----------------------------------------------------------------------