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In many cases, you will want to redefine only a few of the
characters to suit your needs; the rest of the alphabet will work fine
as it is. As you have seen, it is possible to switch back and forth at
will between the normal character set and the user-defined character
set. It is, however, rather inconvenient.
Therefore, the LQ has a command which allows you to copy all
of the standard characters from ROM to the user-defined character
set. The command format is:
ESC:OnO
If the variable
n
=
0, Roman is selected. If
n
= 1, Sans Serif is
selected.
This command will cancel any user-defined characters you have
created. You must send this command to the printer before you
define characters.
If you use this command at the beginning of a program, then
define your special characters and select the user-defined. character
set, you can print with the user-defined set as your normal character
set. You’ll never need to switch back and forth between sets.
Letter Quality characters
If you select Letter Quality printing with the ESC xl command,
you can design user-defined characters using up to 29 columns of
the Letter Quality/Proportional grid. The dot columns are spaced
closer together horizontally than draft style dot columns (the
horizontal dot spacing is 1/360th of an inch as opposed to 1/120th
of an inch for draft characters).
Proportional mode characters
Selecting the proportional character mode will yield user-defined
characters of the highest resolution. Characters can be designed
using all 37 columns of the Letter Quality/Proportional grid.
Remember that in Letter Quality and proportional, as in draft,
you cannot place dots in adjacent columns. There must be an empty
dot position to the left and right of each dot that prints.
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