mgp(1x) on Linux
The text 9c5ed27a532a, as Debian 3.0 (Woody) shipped it.
MagicPoint -- an X11 based presentation tool
Flags it lists
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-B -
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-D -
-E -
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-G -
-O -
-Q -
-R -
-S -
-T -
-U -
-V -
-X -
-b -
-c -
-d -
-f -
-g -
-h -
-l -
-n -
-o -
-p -
-q -
-t -
-v -
-w -
-x