Canon EOS 90D Advanced User's Manual page 72

Viewing the Screen as You Shoot (Live View Shooting)
Shooting with the Touch Shutter
Just by tapping on the screen, you can focus and take the picture
automatically.
72
1
Enable the Touch Shutter.
Tap [ y ] on the screen's bottom left.

Each time you tap on the icon, it will
toggle between [ y ] and [ x ].
[ x ] (Touch Shutter: Enable)

The camera will focus on the spot you
tap on, then the picture will be taken.
[ y ] (Touch Shutter: Disable)

You can tap on a spot to perform
focusing on the spot. Press the shutter
button completely to take the picture.
2
Tap on the screen to shoot.
Tap on the face or subject on the screen.

On the point you tap, the camera will
focus (Touch AF) with the AF method
that was set ( = 135– = 136).
When [ x ] is set, the AF point turns

green when focus is achieved, then the
picture is taken automatically.
If focus is not achieved, the AF point

turns orange and the picture cannot be
taken. Tap on the face or subject on the
screen again.