Canon EOS 7D Mark II (G) Instruction Manual page 89

AF Operation Indicator
The AF operation indicator can be displayed outside the viewfinder's image
area (p.132).
AF Points Lighting Up in Red
The AF points light up in red in low-light conditions. In the <d>, <s>,
<f>, <a>, or <F> mode, you can set whether to have the AF points
light up in red (p.131).
AF-Assist Beam with the Built-in Flash
Under low-light conditions, when you press the shutter button halfway,
the built-in flash may fire a brief burst of flashes. It illuminates the
subject to help autofocusing.
In the <A> mode, if [Flash firing] is set to <b>, the built-in flash will
not emit the AF-assist beam.
The AF-assist beam will not be emitted with AI Servo AF operation.
The built-in flash will make a sound when firing continuously. This is
normal and not a malfunction.
The effective range of the AF-assist beam emitted by the built-in flash is
approx. 4 meters/13.1 feet.
In the <d>, <s>, <f>, <a>, or <F> mode, press the <I> button
to raise the built-in flash. Then it will fire the AF-assist beam when
necessary.
f: Selecting the AF OperationN
When you press the shutter button
halfway and the camera is focusing with
AF, the <i> icon will appear on the
lower right of the viewfinder.
In the One-Shot AF mode, the icon also
appears if you press the shutter button
halfway after focus is achieved.
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