Canon EOS RP Instruction Manual page 745

C.Fn III-5: Customize buttons
You can assign frequently used functions to buttons, such as < V > or < p >.
Different functions, for use when shooting still photos or movies, can be
assigned to the same button.
1
Select a part of the bar.
2
Select a function to assign.
Press < 0 > to set it.
z
Custom Function Settings
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