Canon EOS 5DS Instruction Manual page 425

: Picture Style
Press <0> to display the Picture Style selection setting screen on the
LCD monitor (p.164).
: Depth-of-field preview
When you press the depth-of-field preview button, the aperture will stop
down and you can check the depth of field (p.209).
: IS start
If you press the button assigned to this function when the lens's IS
switch is set to <1>, lens's Image Stabilizer will operate (p.55).
: Menu display
Press <0> to display the menu on the LCD monitor.
: Register/recall shooting function
You can manually set the main shooting functions such as the shutter
speed, aperture, ISO speed, metering mode and AF area selection
mode, and register them to the camera. Only while you hold down the
button assigned to this function, you can recall and use the registered
shooting function settings and shoot.
*7:On the setting screen, press the <B> button to
display the detailed settings. Turn the <5> or
<6> dial to select the function to be registered,
then press <0> to append a checkmark [X] to it.
When you select a function and press <0>, you
can adjust the setting. By pressing the <L> button,
you can revert the settings to their defaults.
By selecting [Register current settings], the
camera's current settings will be registered. To
register the AF point, see page 418.
83: Custom ControlsN
425