Canon EOS-1D X Mark III DSLR Camera (Body Only) - Manual (Page 113)

M: Manual Exposure
Exposure Compensation with ISO Auto
In this mode, you set both the shutter speed and aperture value as desired. To determine
the exposure, refer to the exposure level indicator in the viewfinder or use a commercially
available exposure meter.
* < > stands for Manual.
1.
Set the shooting mode to < >.
Press the < > button and turn the < > or < > dial to
select < >.
2.
Set the ISO speed ( ).
3.
Set the shutter speed and aperture value.
To set the shutter speed (1), turn the < > dial, and to set the
aperture value (2), turn the < > dial.
If these settings cannot be set, set the power switch to < >, then
turn the < > or < > dial.
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