Canon EOS R6 Mark II Mirrorless Camera with 24-105mm f/4-7.1 Lens - Manual (Page 153)

5.
Take the picture.
After you press the shutter button completely, the bulb exposure
continues for your specified time.
[ ] and the exposure time are displayed on the screen during
bulb timer shooting.
To clear the timer setting, select [ Disable ] in step 2.
Caution
Bulb exposure stops if you press the shutter button completely and release it during
the timer. Note that setting the power switch to <
> ends bulb timer shooting
when the camera is set to [ : Shooting creative filters ].
Bulb exposure continues even after your specified exposure time if you keep
pressing the shutter button completely (which overrides automatic stopping when
your specified exposure time elapses).
The bulb timer is cleared (and reverts to [
Disable ]) when you switch shooting
modes.
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