Canon EOS 5Ds Instruction Manual page 423

: Exposure compensation (hold button, turn
You can set the exposure compensation by holding down <0> and
turning the <6> dial. Convenient when you want to set exposure
compensation while <a> manual exposure and Auto ISO are set.
: Shutter speed setting in M mode
In manual exposure <a>, you can set the shutter speed with the
<6> or <5> dial.
: Aperture setting in M mode
In manual exposure <a>, you can set the aperture with the <5> or
<6> dial.
: Switch between crop/aspect
When you press the <B> button, you can switch from full-frame
shooting to crop shooting (approx. 1.3x or 1.6x) or shooting with the set
aspect ratio (1:1, 4:3, or 16:9). Pressing the <B> button switches
the setting.
*5:On the setting screen, press the <B> button to
display the detailed settings screen. Turn the <5>
dial to select the setting to be switched to, then
press <0> to append a checkmark [X].
The operations for [Set ISO speed (hold btn, turn
comp (hold btn, turn
set to the right (Multi function lock, p.59).
)] are possible even when the <R> switch is
83: Custom ControlsN
)
)] (p.422) and [Expo
423