Intermec PB50 User Manual page 18

Chapter 1 — Using the PB50 Portable Label Printer
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2 Press down on the media adjust guide and slide the two media
supports apart.
3 Insert a roll of media and press the media adjust guide until
the roll is held firmly in place. Make sure you load the media
clockwise so that it pulls off the core from the bottom of the
printer.
4 Pull out a few inches of the media.
PB50 Portable Label Printer User's Guide