Overlays, underlays

[Pablo Fernicola]

Are overlays and underlays available on the Personal Iris?  The info on
page 11-1 of the Graphics Library User's Guide is not clear about it.
If they are not available, can I achieve the same results using writemasks?

Thanks!
Pablo
pff at beach.cis.ufl.edu
--
pff at beach.cis.ufl.edu  Pablo Fernicola - Machine Intelligence Laboratory - UF
"That has nothing to do with computers; it is software."