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I
The following two commands control "transparency", whether or not white
sections of an image block out black pixels that are already in place.
<ESC>
'
n
N
This selects the source transparency mode. whether white areas of the source
image should be treated as transparent (and do not "white-out" black pixels
they cover) or opaque (in which case they white-out black pixels).
Set n to Ofor the transparent mode and to 1 for the opaque mode.
<ESC>
*
?
O
This selects the pattern transparency mode, similarly to the above command,
whether the current pattern should be treated as transparent or opaque.
Set n to Ofor the transparent mode and to 1 for the opaque mode.
4
E
P
g
To specify a block five inches wide you could use a horizontal dimension of
1500dots (5 inches times 300 dots). That command would look like this:
<ESC>
"C
1500A
To print that area with a 25 percent gray-scale pattern. the commands you
send would be:
<ESC> *C25G
<ESC>
*C
2p
But to print an area filled with the horizontal bar pattern, the commands you
send would be:
<ESC>
*C
1G
<ESC>
*C
3P
(You could combine these commands as <ESC> *c lg 3P.)
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