GE PJ1 - Manual (Page 60)

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Playback Menu
Mode :
In Playback mode, press the button to enter the Playback
menu.
Please refer to the following sections for detailed instructions
on the various menu options.
Protect
To prevent any pictures or videos from being accidentally
erased, use this setting to lock one or all of the files.
To protect/unprotect a picture or video:
1. Use the Up/Down arrow button to select Protection, press
the or Right button to enter the submenu.