Canon RowerShot V10 Advanced User's Manual page 117

Protecting All Images in a Folder or on a Card
You can protect all the images in a folder or on a card at once.
When you select [All images in folder] or [All images on card] in [ : Protect
images], all the images in the folder or on the card will be protected.
To cancel protection, select [Unprotect all images in folder] or [Unprotect all images
on card].
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