PS TEXT FORMAT Reference Manual

TFORMCVT: Converting From TGAL to TFORM
11387 Tandem Computers Incorporated E-35
TFORMCVT can figure out whether you intend to print in boldface,
underline, or overstrike. If you intend to overstrike (not underline or
boldface, but overprint different characters) two or more different
characters in the same character position, TFORMCVT does what it
can, then generates an error message. For example:
TGAL Input:
\OV 4
SILLY
SILLY
fools
I say
-----
The TFORMCVT output is:
BREAK PARAGRAPHS
COMMENT I say
COMMENT ^ WARNING **** COMMAND NOT RECOGNIZED. LINE:
n
UNDERLINE(\BOLD(S\<fI\<oL\<oL\<lY\<s\)\)
In TGAL, if JOIN is on and text is overstruck, text lines may be joined
to overprinting lines but overprinting lines are never joined to text
lines. That is, TGAL output always has its overstruck text at the
beginning of a joined line. TFORM treats overstruck text as regular
text. TFORMCVT does not compensate for this difference.