Canon POWERSHOT A3100IS User Manual page 100

Protecting images
Choose the ending image.
_, Press the )' button, choose [Last image]
and press the @ button.
_, Press the 4_ buttons to choose an image,
and press the @ button.
_, You cannot choose images before the first
image.
4 Protect images.
_, Press the "v button, choose [Protect] and
press the @ button.
@ Choose AJ| Jntages
Choose [All images].
_, Follow Step 2 on p. 98 to choose [All
Images] and press the @ button.
2 Protect images.
_:;_Press the Av buttons to choose [Protect]
and press the @ button.
YOU Can Unlock groups Of protected images if You choose [Unlock] in Step
_" 4, wh e n[SeectRange]orStep2wh e n[A mages].