Canon EOS 90D DSLR Camera with 18-135mm Lens - Manual (Page 569)

569
Custom Function Setting Items
C.Fn II-15: Viewfi nder display illumination

0: Auto
The AF points achieving focus in low light or with a dark subject will
automatically light up in red.

1: Enable
The AF points light up in red regardless of the ambient light level.

2: Disable
The AF points do not light up in red.
With
[Auto]
or
[Enable]
set, you can set whether the AF points are to light
up in red when you press the <
Q
> button during AI Servo AF.

OFF: Non illuminated
The AF points will not light up during AI Servo AF.

ON: Illuminated
The AF points used for focusing light up in red during AI Servo AF. The
AF points also light up during continuous shooting.
If set to
[2:Disable]
, this function will not work.
o When you press the <
S
> or <
G
> button, the AF points will light up in red
regardless of this setting.
o The aspect ratio lines, electronic level, and grid in the viewfi nder will also light
up in red.
C.Fn II-16: AF Microadjustment
You can make fi ne adjustments for the AF’s point of focus ( = 575).