Canon EOS 5Ds Instruction Manual page 412

3 Custom Function SettingsN
Default Erase option
During image playback and image review after image capture, when
you press the <L> button, the erase menu appears (p.358). You can
set which option, [Cancel] or [Erase], is to be preselected on this
screen.
If [Erase] is set, you can just press <0> to quickly erase the image.
: [Cancel] selected
L : [Erase] selected
If [Erase] is set, be careful not to erase an image accidentally.
Retract lens on power off
This is to set the lens retraction mechanism for when a gear-driven
STM lens (such as EF40mm f/2.8 STM) is attached to the camera.
You can set it to retract the extended lens automatically when the
camera's power switch is set to <2>.
ON: Enable
OFF: Disable
With auto power off, the lens will not retract regardless of the setting.
Make sure that the lens has been retracted before detaching it.
When [Enable] is set, this function takes effect regardless of the lens's
focus mode switch setting (AF or MF).
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