Canon EOS R5 C VR Creator Kit with RF 5.2mm f/2.8 Dual Fisheye Lens - Manual (Page 224)

8.
Shoot the next exposures.
Images captured so far are displayed merged. For only image display,
press the <
> button repeatedly.
As you shoot, you can view the multiple-exposure image so far, check
exposure, and see how the images will be merged by holding down the
depth-of-field preview button (or the button assigned to [
Depth-of-field
preview ] in [ : Customize buttons ]).
Multiple-exposure shooting will end when the set number of exposures
are taken.
Note
With [ On:Func/Ctrl ], you can press the < > button to view the multiple-
exposure image so far or delete the previous single exposure ( ).
As shooting information, the multiple-exposure image has information captured for
the last shot.
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