Intermec EasyCoder 7421 User Manual page 19

In addition to loading roll media in the printer, you can:
Use the peel-off option.
Load fanfold media.
You can load media with the printer power turned on or off. The
following procedures for loading media assume that you have
turned on the printer. Refer to the EasyCoder 7421 Printer Setup
Guide for instructions on loading rolls of media.
Use the peel-off option in printing applications where you want
to apply labels to a surface immediately. After printing a label,
the printer presents the label with the backing removed.
Note: You should find a small label with a three-digit sensitivity
number printed on it attached to your roll of media or a 15-digit
number stamped on the side of the media roll. Save this information.
You will need it to set the correct media sensitivity number. For help,
see "Setting the Media Sensitivity Number" in Chapter 2.
Note: Intermec does not recommend using fanfold media with the
peel-off option.