Canon EOS 90D Advanced User's Manual page 246

Multiple Exposures
(1)
246
4
Set the [No. of exposures].
Select the number of exposures, then

press < 0 >.
5
Set a [Continue Mult-exp] option.
With [1 shot only], multiple-exposure

shooting will be canceled automatically
after the shooting ends.
With [Continuously], multiple-exposure

shooting continues until the setting in
step 2 is set to [Disable].
6
Shoot the fi rst exposure.
The captured image will be displayed.

In (1) on the screen, you can check the

number of exposures left.
Pressing the < x > button enables you

to view the captured image ( = 249).
7
Shoot the next exposures.
Images captured so far are displayed

merged. For image-only display, press
the < B > button repeatedly.
To view the multiple-exposure image

so far, check exposure, and see how
the images will be merged, hold down
the depth-of-fi eld preview button (or
the button assigned to [Depth-of-fi eld
preview]) in Live View shooting.
Multiple-exposure shooting will end

when the set number of exposures are
taken.