Displaying the Grid and Electronic Level
You can display a grid and electronic level in the viewfinder and on the
LCD monitor to help correct camera tilt.
Displaying the Grid in the Viewfinder
Displaying the Electronic Level in the Viewfinder
The viewfinder can display an electronic level using the AF points. For
details, see Custom Controls (p.343).
A grid can also be displayed on the LCD monitor during Live View shooting
and movie shooting (p.212, 247).
Select [VF grid display].
Under the  tab, select [VF grid
display], then press <0>.
Turn the <5> dial to select [Enable],
then press <0>.
The grid will be displayed in the