Pentax K-X Operating Manual page 108

You can delete a llsaved i mages atonce.
Deleted irnages Cannot be restored.
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Select [Delete All Images] in the [I-_-I Playback 1] menu
and press the four-way controller (_).
The confirmation screen for deleting all images is displayed.
Press the four-way controller (A)
to select [Delete All Images].
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3
Press the
OK
button.
All images are deleted.
The confirmation screen appears when
there are protected images. Use the four-
way controller ( • • ) to select [Delete All]
or [Leave All] and press the OK button.
When [Delete All] is selected, protected
images are also deleted.