Canon POWERSHOT D20 User Manual page 27

Protect important images to prevent accidental erasure by the camera
(p. 138).
Press the @ button, and then choose 0=_ in
the menu (p. 41 ). [Protected] is displayed.
To cancel protection, repeat this process and
choose 0_ again, and then press the @
button.
_d_ rotected images on a memory card will be erased if you format the
card (pp. 157, 158).
Access the setting screen.
Press the MENU button, and then choose
[Protect] on the DE] tab (p. 42).
Choose a selection method.
Choose a menu item and a setting as desired
(p= 42).
To return to the menu screen, press the
MENU
button.
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