Canon EOS 90D Advanced User's Manual page 599

The AF point is blinking or two AF points are displayed.
Regarding the AF points lighting up or blinking when you press the < S >

or < G > button, see = 133.
The AF points do not light up in red.
The AF points light up in red when you shoot under low light or when

focus is achieved on a dark subject.
In the < d >, < s >, < f >, < a >, or < F > mode, you can set whether to

have the AF points light up in red for when focus is achieved ( = 569).
I cannot lock the focus and recompose the shot.
Set the AF operation to One-Shot AF. Focus lock is not possible in the

AI Servo AF/Servo AF mode or when servo takes eff ect in AI Focus AF
mode ( = 80, = 125).
The continuous shooting speed is slow.
The continuous shooting speed for high-speed continuous shooting may

be lower, depending on conditions such as these: temperature, battery
level, fl icker reduction, shutter speed, aperture, subject conditions,
brightness, AF operation, type of lens, live view shooting, use of fl ash,
and shooting settings, etc. For details, see = 150 or = 152.
The maximum burst during continuous shooting is lower.
If you shoot a subject that has fi ne detail such as a fi eld of grass, the fi le

size will be larger, and the actual maximum burst may be lower than the
number listed on = 615.
Troubleshooting Guide
599