OM SYSTEM OM-5 Mirrorless Camera with 12-45mm f/4 PRO Lens (Silver) - Manual (Page 260)

Removing Protection from All Pictures (Reset
Protect)
Remove protection from multiple pictures simultaneously.
Highlight [Reset Protect] in the q Playback Menu and press the OK button.
Highlight [Yes] and press the OK button.
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Removing Protection from All Pictures (Reset
Protect)
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