Canon EOS 5D MARK IV Instruction Manual page 148

3 Customizing AF FunctionsN
Initial AF Point,
You can set the AI Servo AF's starting AF point for when the AF area
selection mode is set to Auto selection AF.
: Manual
If you switch from Manual select.:Spot AF, Manual selection:1 pt AF,
Expand AF area:
AF, AI Servo AF will start with the AF point that was manually
selected before the switch. Useful if you want AI Servo AF to start
with the AF point that was selected before the AF area selection
mode was switched to Auto selection AF.
After setting the AF area selection mode to Auto selection AF with the
[83: Custom Controls] menu's [Metering and AF start] (p.500),
[Switch to registered AF func.] (p.502) or [Register/recall
shooting func] (p.508), during shooting with Manual select: Spot AF,
Manual selection: 1 pt AF, Expand AF area:
Surround, you can press the assigned button to start shooting with
Auto selection AF set for the AI Servo AF using the last used AF point
as the initial AF point.
AUTO: Auto
The AF point which AI Servo AF starts with is set automatically to suit
the shooting conditions.
When [Manual
that corresponds to the manually-selected AF point even if you switch AF
area selection mode to Zone AF or Large Zone AF.
146
AI Servo AF
: Initial
AI Servo AF will start with the
manually-selected AF point when the
AF operation is set to AI Servo AF and
the AF area selection mode is set to
Auto selection AF.
AF pt
, or Expand AF area:Surround to Auto selection
AF pt] is set, AI Servo AF will start with the zone
AF pt selected
, or Expand AF area:
AF4