Canon EOS 7D Mark II Instruction Manual page 344

3 Menu Function Settings
Grid display
With [3x3 l] or [6x4 m], you can display grid lines to help you
level the camera vertically or horizontally. Also, with [3x3+diag n],
the grid is displayed together with diagonal lines to help you
compose with better balance by aligning the intersections over the
subject.
Note that the grid is not displayed during movie shooting.
Movie recording quality
You can set the movie recording format (MOV or MP4), movie
recording size, and 24.00p. For details, see page 330.
Sound recording
You can set sound-recording settings. For details, see page 336.
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