Define fit regions (windows).
FWINDOWS a /
FWIN b / KEEP
Define display window A to be the first fit window.
Then add display window B to be the second one.
List of windows, interpreted as follows:
window item = number: condition,
window item = letter: display window,
window item = #: temporary window
If omitted and no other keyword (except KEEP) is given a window is prompted.
The limits of all display windows are adopted as fit regions
The limits of all conditions are adopted as fit regions
The fit windows are entered within a loop.
Lower and upper limits are prompted, either via cursor or,
if the cursor is unavailable, by terminal input.
The range of the data is the fit region.
Previous fit definitions of fit windows are kept provided they were not
reset by command FINIT
List all currently defined fit windows.
Mark all currently defined fit windows in the current picture.