Canon EOS-1D X Instruction Manual page 348

85: Custom Controls
: Metering and AF start
When you press the button assigned to this function, metering and AF
are executed.
*1: If it is assigned to the <p> or <A> button
and you press the <B> button in step 3 on page
343, you can set the AF in detail. For shooting,
pressing the <p> or <A> button will execute
AF as it was set.
AF starting point
When [Registered AF point] is set, you can press the <p> or
<A> button to switch to the registered AF point.
AF Point Registration Procedure
1. Set the AF Area selection mode to one of the following: Single-point
Spot AF (manual selection), Single-point AF (manual selection), AF
point expansion (manual selection
selection, surrounding points), or 61-point automatic selection AF. Zone
AF (manual selection of zone) cannot be selected.
2. Select an AF point manually.
3. Hold down the <S> button and press the <i> button. A beep will
sound and the AF point will be registered. If the AF area selection
mode is set to other than 61-point automatic selection AF, the
registered AF point will blink.
When an AF point is registered, the following will be displayed:
• 61-point automatic selection AF:
• Spot AF, 1 pt AF, Expand AF Area: SEL
When registered with SEL
If [24: Orientation linked AF point] is set to [Separate AF pts:
Area+pt] or [Separate AF pts: Pt only], you can register the AF points
to be used separately for vertical (grip at the top or bottom) and
horizontal shooting.
To cancel the registered AF point, hold down the <S> button and press
the <O> button. The registered AF point will also be canceled if you
select [54: Clear all camera settings].
348
), AF point expansion (manual
HP (HP: Home Position)
(Center), SEL HP (Off-center)
or SEL HP, the registered AF point will blink.