Pentax Optio A20 - Manual (Page 127)

125
6
Play
ba
ck/
Del
eti
ng
/Ed
iti
ng
4
Press the Green button.
A confirmation dialog appears.
5
Use the four-way controller (23) to select
[Select & Delete].
6
Press the OK button.
The selected images and sound files are deleted.
You cannot delete protected images, movies or sounds. (1p.126)