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42
Table 5-3
Underline and overline commands
1 Function
1 Control code
I
Underline ON
(ESC) "-"l
Underline OFF
(ESC) "-"0
Overline ON
(ESC) "p"1
f Overline OFF
,
\---I
-
1 (ESC) "'-"O
Again, that's simple. Let's try it with this program:
10 ' Demo of underlining
and overlining
20 LPRINT "Demo of ";
30 LPRINT CHR$(27) ;"-1";
40 LPRINT "UNDELINED";
50 LPRINT CHR$(27) ;"-O";
60 LPRI NT '* and " ;
70 LPRINT CHR$(27);"
1";
80 LPRINT "OVERLINED";
90 LPRINT CHR$ (27) ; "-0" ;
100
LPRINT " printing."
It should come out like this:
Demo of
UNDELINED and m
printing.
In this program underline
is turned on in line 30 with (ESC)
"
-"l,
and then off in line 50 with (ESC) "-"O. The overline is
turned on in line 70 with (ESC)"-"
1, and then off in line 90
with (ESC)"-"O.
There's a new little wrinkle in this program,
though. The semicolons at the end of the lines told BASIC that
those lines were to be continued.
Therefore,
BASIC didn't send
a carriage return and line feed at the end of those lines. We just
did this to illustrate that all these control codes can be used in
the middle of a line. It's easy to underline
or overline only part
of a line.
H Boldface printing
Your printer
has very good density when it's just printing
regularly. But sometimes
you may want something
to stand out
from the rest of the page. This printer provides a way to do this
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