Canon EOS R6 Mark II Mirrorless Camera with 24-105mm f/4-7.1 Lens - Manual (Page 413)

12.
Take a test shot.
Press the < > button and double-check the Time required (1) and
Interval (2) shown on the screen.
As in still photo shooting, set the exposure and shooting functions, then
press the shutter button halfway to focus.
Press the shutter button completely to take a test shot, which is
recorded to the card as a still photo.
If there are no problems with the test shot, go to the next step.
To take more test shots, repeat this step.
Note
Test shots are captured in JPEG quality.
In [ ] mode, you can set the shutter speed in a range of 1/4000
to 30 sec.
You can set the maximum limit for Auto ISO in [ ] mode or in
[ ] mode with ISO Auto, in the [ Max for Auto ] option of
[ : ISO speed settings ] ( ).
If you have set [ Half-press ] in [ : Shutter btn function for
movies ] to [ Meter.+ Servo AF ], it is automatically changed to
[ Meter.+One-Shot AF ] when you set up time-lapse movie
recording.
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