Avery Dennison Monarch 9855 Operator's Handbook, Maintenance, Service & Parts Manual page 22

9. Hold the printhead assembly by the printhead tab while pressing down on
the printhead release.
10. Close the printhead by pressing down on the thumb well until you hear it
click into place.
Thumb W ell
11. Close the cover.
12. Press Feed/Cut to position the supply under the printhead.
You may need to adjust the wide/narrow knobs depending on the width of
your supply. See "Adjusting the Wide/Narrow Knobs" for more
information.
Note: If the printer will be unused for extended periods of time, we
recommend leaving the printhead unlatched.
2-6 Operator's Handbook