Canon EOS-1D X Mark III Advanced User's Manual page 425

2.
Scroll the image.
Use <
With the Smart controller, you can also move the magnified area itself.
Press the <
Note
To switch to other images while maintaining magnified view, turn the <
the times of 1. and 3. only).
Magnification is not available for movies.
> to scroll around the magnified image.
> or < > button to exit magnified view.
425
> dial (at