Canon EOS RP Advanced User's Manual page 543

Functions Available for Dials
Shutter speed setting in M mode
Aperture setting in M mode
Change aperture (hold metering button)
Change shutter speed (hold metering button)
Set ISO speed (hold metering button)
Exposure compensation (hold metering
button)
Change aperture value
Change shutter speed
Set ISO Speed
Exposure compensation
No function (disabled)
< T >: Control ring on RF lenses and mount adapters
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Function
Custom Function Settings
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