Intermec EasyCoder 7421 User Manual page 28

In fanfold printing, you place a stack of fanfold media at the rear
of the printer and feed it into the printer through a slot in the
rear cover.
1. Open the top cover and remove the spindle from the printer.
Save the spindle for use with roll media.
2. Open the printhead assembly by pulling the yellow release
lever (on the left side of the printer) toward the front of the
printer.
7421U.019