% @(#)imaged.alq	19.1 (ESO-IPG) 02/25/03 14:03:25 

 Depending upon the capabilities of the X11 display there may be one or
 more LUTs. The no. of entries (colours) in a LUT is 256 only in the case of
 multiple LUTs. If there is only one LUT, which is the general case, there
 are less entries in that LUT. The command "show/display" displays the
 number of colours in the LUTs.


 There are two cursors connected.
 The first cursor (cursor 0) is moved via the mouse, the second cursor 
 (cursor 1) is moved via the Arrow keys on the keyboard.

 The leftmost button on the mouse is the ENTER button. The rightmost button 
 is the EXIT button. The RETURN key on the keyboard is the EXECUTE button. 
 The EXECUTE button works usually like the ENTER button, only in some very
 special cases its functionality is different from the ENTER button. 
 If so, it is explained in the relevant help info, one example is the MAGNITUDE
 command.

 Pressing the ENTER button on the mouse requires a stable hand...
 If you press the ENTER button and only slightly move the mouse by doing so,
 this will be interpreted as a Cursor Move instead. Therefore, it may be
 safer to move the cursor via the mouse but get the cursor input with 
 the EXECUTE button.

 Many MIDAS commands use a Region of Interest (ROI) which looks like 
 a cursor rectangle. 
 The ROI is moved via the mouse and is resized via the arrow keys. 
 The resizing of the ROI may be done in chunks. The size of these chunks 
 is controlled via the keys 0, 1, 2, ..., 9  on the keyboard. 
 Pressing the 0 key corresponds to a size of a single pixel, whereas
 1, 2, ... lead to larger chunk sizes.
 
 Some MIDAS commands need a displacement, e.g. MODIFY/LUT.
 Use the arrow keys to move left, right and to thin (down) or thicken (up).
 Again the speed of the movements is controlled via the keys 0, 1, ...

 Please, note that all of the above only works if the cursor connected 
 to the mouse is inside the image display window!!


 You can resize the display, graphics or zoom windows. But you have to 
 replot/reload your image after the resize operation to assure that future 
 cursor related commands will work correctly.


                      *** Important Note ***

 
 If the Idi display server which controls all the Midas windows dies for any
 reason (e.g. you hit Control C while loading an image) and your Midas windows
 disappear from the screen, you have to use the command RESET/DISPLAY before
 you can recreate your windows.

