Pentax 3 User Manual page 40

'No Feed' mode ignores all Form Feed commands, and does not
advance the paper after printing. This can be of particular
help to roll paper users who are printing only partial pages
and do not wish to waste additional paper at the end of each
document. The page may be manually advanced using the
Main Switch.
Auto-On:
When external power is applied to the printer, there are three
possible actions that the printer may take.
If Auto-On is set to 'Disabled', the printer will place itself in a
"sleep" state where minimal power is used. The Main
Switch must be pressed to wake the printer up for printing.
If Auto-On is set to 'Enabled', the printer will power up as
soon as an external power source is connected to the printer.
This can be useful in certain mobile installations where
access to the Main Switch is difficult or unavailable.
If Auto-On is set to 'Enabled-No Main Switch', the printer will
power up as soon as an external power source is connected,
and furthermore, the Main Switch cannot be used to turn the
printer off. This may be useful in some mobile installations
where the button could be accidentally pressed. Power
must be disconnected to shut off the printer.
Auto-Off:
When the printer is running on battery power, you may wish to
have the printer turn off automatically to conserve the battery.
You may choose to disable this feature by selecting 'None', or
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