I have a sim_movable_agent which I would like to change the colour and
label (the string in rc_pic_strings) of at runtime.  The slots
rc_pic_lines and rc_pic_strings contain this information, I have written
a procedure which changes these variables to change the colour and the
label. The problem is when I change the colour or label it leaves the a
'residue' of the old colour/label on the background. I've been looking
for a standard procedure which updates these variables but can't find
one. I don't want to redraw the whole background is there another way of
preventing the residue?

Thanks

Mike