Canon EOS 5D Mark III Instruction Manual page 284

L Erasing Images
3 Erasing All Images in a Folder or Card
You can erase all the images in a folder or on a card at one time. When
[31: Erase images] is set to [All images in folder] or [All images on
card], all the images in the folder or card will be erased.
To also erase protected images, format the card (p.53).
When [All images on card] is selected, the images will be erased on the
card selected under [51: Record func+card/folder sel.] with [Record/
play] ([Playback]).
284
2
Select [Select and erase images].
Select [Select and erase images],
then press <0>.
The images will be displayed.
If you press the <u> button and turn
the <6> dial counterclockwise, you
can select an image from a three-image
display. To return to the single-image
display, turn the <6> dial clockwise.
3 Select the images to be erased.
Turn the <5> dial to select the
image to be erased, then press
<0>.
A <X> checkmark will be displayed
on the upper left.
To select other images to be erased,
repeat step 3.
4
Erase the images.
Press the <L> button.
Select [OK], then press <0>.
The selected images will be erased.