Canon EOS-1D X Mark II DSLR Camera (Body Only) - Manual (Page 452)

7 Custom Controls
452
Only while holding down the button assigned with this function, you can
apply AF with the following settings: AF area selection mode (p.91),
Tracking sensitivity (p.118), Acceleration/deceleration tracking (p.119),
AF point auto switching (p.120), AI Servo 1st image priority (p.122), and
AI Servo 2nd image priority (p.123). Useful when you want to change
the AF characteristics during AI Servo AF.
*2: With the setting screen displayed, press the
< B > button to display the detailed settings
screen. Turn the < 5 > or < 6 > dial to select the
parameter to be registered, then press < 0 > to
add a checkmark [ X ]. When you select a
parameter, then press < 0 >, you can adjust the
parameter setting. By pressing the < L > button,
you can revert the settings to their defaults.
You can switch the AF operation. In One-Shot AF mode, when you
press the button to which this function is assigned, the camera switches
to AI Servo AF mode. If you press the button in the AI Servo AF mode,
the camera switches to One-Shot AF mode. Useful when you need to
keep switching between One-Shot AF and AI Servo AF for a subject
that keeps moving and stopping.
*3: With the setting screen displayed, when you press the < B > button, you can select
[ Switch only when btn is held ] or [ Switch each time btn is pressed ].
While the metering timer is active, when you press the button assigned
to this function, focusing point can be switched to the registered AF
point.
*4: With the setting screen displayed, when you press the < B > button, you can select
[ Switch only when btn is held ] or [ Switch each time btn is pressed ]. To register
the AF point, see page 450.
: Switch to registered AF function
: ONE SHOT z AI SERVO
: Switch to registered AF point