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F1      : Show DISPLAY.DOC          ALT-A   : Re-read directory. Keep desc.
Ctrl-F1 : Show user-defined help    ALT-B   : Re-read directory. Discard desc.
F2      : Change disk drive         ALT-C   : Copy single file (ignore tags)
F3      : Change filename masks     ALT-D   : Delete single file (ignores tags)
F4      : Change parameters         ALT-E   : Edit description entry
F5      : Special effects           ALT-M   : Move single file (ignores tags)
F6,m,M  : Move file(s)              ALT-S   : Save config file
F7      : Make Directory            ALT-T   : Tag all files
F8,d,D  : Delete file(s)            ALT-U   : Untag all files
F9      : Open menubar              ALT-W   : Write description entries
ESC,F10 : Quit                      ALT-X   : Quit program without prompting
                                    ALT-Z   : Shell to DOS


CTRL-A -- CTRL-Z : change disk drive.
0..9; SHIFT-A..Z : Jump to first file whose name starts with this character.
TAB              : In mode selection screen : Change process target.
                   In file selection screen : Show previously loaded image.
Ins              : Change display type (8, 15, 16, 24 bits).
Page Up/Down     : Move one page.
Left/Right arrow : Change display type In 'screen' & 'effects' menu.
BACKSPACE        : Go up one level in the directory tree.
+                : Group tag
-                : Group untag

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b,B : Batch conversion (converts tagged files to a single format).
      You can perform up to 8 operations.  Each is independent of the others.
c,C : Copy File(s)
d,D : see F8
e,E : Contact sheet making.
f,F : Display disk free space.
l,L : List available graphic/text modes.
m.M : see F6
o,O : Display font.
p,P : Turn preview on/off.
q,Q : Accumulation color quantization.
      Finds the best palette set for a group of files.
      Very useful for producing animation pictures.
r,R : Rename file
s,S : Slide Show (shows tagged files). ESCAPE to terminate.
t,T   : Tag/Untag file
u,U   : Untag file
v,V : View text file.
w,W : Wait/Pause in slide show.
w,W : Write previously loaded image.
x,X : View binary file.
z,Z : Display first 10 bytes in Ascii, Hex and Dec modes.

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In graphics mode :
    RETURN,SPACE,ESCAPE : return to the text mode.
    '+' : Go to next resolution.
    '-' : Go to previous resolution.
    Arrow keys, Home, End, Page Up, Page Down : Scroll image.
      Home: Left-most.
      End: Right-most.
      Page Up: Top of image.
      Page Down: Bottom of image.
    CTRL-Arrow keys: Crop image by one line.
    CTRL-SHIFT-Arrow keys: Big Crop (Controlled by 'big_crop_step').
    F1 .. F8 : Gamma correction.
      F1,F3,F5,F7: decrease Red,Green,Blue,All.
      F2,F4,F6,F8: increase Red,Green,Blue,All.
    F9,F10 : Zoom Out/In.
    ALT-Z : Pop out graphic menu.
      SPACE to close.
    ALT-E : Edit description entry.

In text viewer :
    F2 : Search string (case-sensitive).
    F3 : Search string (case-insensitive).
In contact sheet preview & Postscript preview :
    '+' : Increase scaling factor.
    '-' : Decrease scaling factor.
    Ins,Del : Fine tune(Inc/Dec) scaling factor.

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In Slide show :
     If the delay time is 0 (dt=0), the program will wait until you hit any key
     'w' or 'W' : pause, any key to continue.
     Up-Arrow   : Go back one image. (dt=0)
     ALT-D      : Mark current image as deletable. '-*-' is displayed at the
                  left-up screen corner. (dt=0)
     ALT-U      : Unmark current image. (dt=0)

In movie:
     SPACE  : pause playing. If you press 'w' or 'W' at this time, DISPLAY
       writes current frame to file. After writing, playback pauses at next 
       frame.
     ESCAPE : Terminate playing.

Mouse Buttons:

   MIDDLE button and CTRL-RIGHT button always mean ESCAPE.

   in read/write menu:
     single-click LEFT or RIGHT button = 'move select bar'.
     double-click LEFT button = RETURN.
     double-click RIGHT button = SPACE.
     CTRL-LEFT button = Tag.

   in other text menus:
     RIGHT button means SPACE.
     single-click LEFT button = 'move select bar'.
     double-click LEFT button = RETURN.

   in contact sheet preview:
     RIGHT = show/hide mouse cursor.
     LEFT = move an image piece if the mouse cursor is shown,
            else leave graphics mode.
     CTRL-LEFT = move contact sheet.

   in image display screen:
     RIGHT = show/hide mouse cursor.
     LEFT = move the image around the screen if the mouse cursor is shown,
            else leave graphics mode.
     CTRL-LEFT = move one page.
     SHIFT-LEFT = show information box.
       You can move this box around screen by click and drag.
     ALT-LEFT = define rectangle for cropping.
       Releasing left button will crop image if ALT key is still pressed,
       else do nothing.
     CTRL-ALT-LEFT = toggle showing image coordinates.

   in mode selection screen:
     Click LEFT bottom at:
       'Imag8' or 'Imag24' : change processing target.
       '000 x 000 x 000' or '000 x 000' : change display type.
       '<--' or '|||' : change linking status.

   In some text regions the mouse cursor will change. Press the LEFT button
   to accomplish that.
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