Auto leveling helps keep images straight. This feature is also applied in vertical shooting.
Select [: Auto level].
Select [Enable].
Caution
Setting [ Auto level] to [Enable] disables the following menu items. Check before shooting, because if they are currently set, they will be changed to another option.
[Shutter mode]: [Elec. 1st-curtain]
[Drive mode]: [] (High speed continuous +) and [] (High-speed continuous) (when [Shutter mode] set to [Mechanical])
: 
Auto level
] (High speed continuous +) and [
] (High-speed continuous) (when [