In reply to:
> 
> In GRASS 3.1 there was a niffty command which allowed one to use their
> mouse to make a regular (or irregular) shaped mask.  It seems to be
> missing in 4.0.  I do not have a digitizer, so was wondering how I
> can delineate a polygon to use in masking operations?  Certainly
> someone out there shares this need.  -- Thanks
> 
The command r.digit allows you to digitize any shape on screen with
the mouse. The resulting map can be used as a mask.
 
Martijn van Leusen
(I saw some funny motto's on this list; where do you get them?)

