Canon EOS RP Mirrorless Camera - Manual (Page 390)

390
Customizing Information Displayed When Shooting
Vertical Viewfinder Display
You can select how viewfinder information is displayed when you are
shooting still photos vertically.
1
Select [VF vertical display].
2
Select an item.
z
On
Information is automatically rotated,
making it easier to read.
z
Off
Information is not automatically rotated.
Grid Display
A grid can be displayed on the screen and viewfinder.
1
Select [Grid display].
2
Select an item.