Brother Pocket Jet6Plus w BT PJ-663 - Manual (Page 21)

How to use P-touch Transfer Manager & P-touch Library
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3
Deleting all data saved in the printer
3
Use the following procedure to delete all templates or other data that are saved in the printer.
a Connect the computer and the printer via USB and turn on the printer.
The printer model name is displayed in the folder view.
b
Right-click the printer, and then select [All Delete].
A confirmation message is displayed.
c
Click [OK].
All templates and other data saved in the printer are deleted.
This feature is only available when the computer and printer are connected via USB.