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When you turn on your printer, its tab stops are automatically set for every eight
columns. Each time you send a tab character (ASCII HT, decimal 9), the printhead
moves 8 columns to the right before printing the next character.
In all three emulations, you can use the ESC D command to set horizontal tab stops
at specific columns on the page. As with margins, the actual position of the stops
depends on the pitch you are using, and will not change if you switch to a different
character width. Be sure to give the stops in ascending order, and after you have
specified all the stops, end the sequence with a NUL character (use CHR$(0) in
BASIC).
If you send the command as ESC D NUL, with no stops specified, all horizontal tab
stops will be cleared, including the 8-column default stops. Turning the printer off and
on again restores the printer’s default tab stops of every eight columns.
Epson
You can set up to 32 tab stops.
Setting a new left margin or sending the Reset command (ESC @) will also restore the
default tab stops.
Maximum value for horizontal tab stops
Pitch ML590 Elite ML591 Elite
10 CPI/proportional 79 135
12 CPI/proportional 95 163
15 CPI 119 203
17.1 CPI 137 233
20 CPI 159 255
Horizontal Tabs Decimal Hex ASCII Comp
Horizontal tab 9 09 HT E P A
Set horizontal tab stops 27 68 1B 44 ESC D E P A
n1...nk 0 n1...nk 00 n1...nk NUL
Epson: n = 1 to 255; k = 1 to 32; IBM: n = 1 to 255; k = 1 to 28
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