Specifies the viewing distance for magnifications and perspective.
Window number (or ALL) to which command applies (defaults to 1).
Distance along the view line from the observer to the focus
point (defaults to value producing full-window display). Distances "too close"
to the object will produce excessive magnifications. If
AUTO, zero, or blank, the program will calculate the distance automatically.
DVAL = USER, the distance of last display will
be used (useful when last display automatically calculated distance).
DVAL interpretation key:
The scale factor is relative to the window shape. For example, for objects centered in a square window and with parallel projection (no perspective), a distance of /2 (+10%) produces a full window magnification, where is the largest in-plane vertical or horizontal dimension. See also /AUTO and /USER commands.
This command is valid in any processor.