Pentax WG-3 Quick Manual page 24

Use the four-way controller (2) to select [Delete].
3
Press the 4 button.
4
Memo
• You can delete multiple images selected from the 6- or 12-image display.
• You can delete all images at once.
• You can protect stored images from being accidentally deleted.
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100
Delete
Cancel
OK OK OK
0017
OK OK OK