First Alert ACTION T-1000 - Manual (Page 40)

SelecType Tips
Once you have learned the simple technique for controlling print styles
with SelecType, you can use it whenever you wish. You should be aware
of a few points, however.
SelecType is designed to control the printing of an entire file or
document, not an individual line or word.
If you are using the NLQ mode, remember that the following
SelecType modes are not available: double-strike and condensed.
If there are print codes in the document or file you are printing, those
codes will override your SelecType settings. This seldom happens,
since you usually won’t use SelecType with files that have such
codes, but if your printer follows the SelecType instructions for only
part of a document, it may be that print codes in the document are
conflicting with the SelecType modes.
After you turn on a mode with SelecType, it stays in effect until the
printer is turned off or until you send a software command that
overrides it. (In general, software commands override SelecType
settings.) If, for example, you use SelecType to print a document in
emphasized type, anything you print after that will be emphasized
unless you first turn the printer off and back on.
SelecType 2-5