Canon EOS R5 C VR Creator Kit with RF 5.2mm f/2.8 Dual Fisheye Lens - Manual (Page 254)

Exposure Simulation
With exposure simulation, image brightness more closely matches the actual brightness
(exposure) of your shots.
1.
Select [ : Expo. simulation].
2.
Set an option.
Enable ( )
The displayed image brightness will be close to the actual brightness (exposure) of the
resulting image. If you set exposure compensation, the image brightness will change
accordingly.
During
Normally, the image is displayed at standard brightness, so it is easy to see ( ).
Only when you hold down the depth-of-field preview button will image brightness
resemble actual brightness (exposure) of the resulting image (
).
Disable ( )
The image is displayed at standard brightness, so it is easy to see. Even if you set
exposure compensation, the image is displayed at the standard brightness.
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