Pentax Optio T20 - Manual (Page 95)

Deleting Images and Sound Files
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Protecting All Images and Sound Files
1
Touch [All Images/Sounds] on the
Protect screen.
A confirmation dialog appears.
2
Touch [Protect].
All the images and sound files are protected.
Memo
To cancel the Protect setting on all your images and sound files, select
[Unprotect] in Step 2.
Protect Unprotect
Protect
all images/sounds