Canon EOS 80D Basic Instruction Manual page 206

k Shooting Movies
You can display the electronic level by pressing the <B> button

(p.66).
Note that if the AF method is set to [u +Tracking] or the camera is

connected to a TV set with an HDMI cable, the electronic level cannot be
displayed.
The electronic level, grid lines, or histogram cannot be displayed during

movie shooting. (The display will disappear when you start shooting a
movie.)
When movie shooting starts, the movie shooting remaining time will

change to the elapsed time.
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