[comp.sys.mac.hypercard] SuperCard in 16 shades of gray

GFX@PSUVM.BITNET (01/21/90)

I was surprised to discover that SuperCard supports color, as long as it
is in 8-bit mode (color or grayscale).  Is there a way to use the 16 shades
of gray (4-bit) available on Apple's FPDs and 2PDs?  Thanks.  Stephane