Canon EOS R5 C User Manual page 684

Custom Functions 3
(1) Dial direction during Tv/Av
(2) Control ring rotation
(3) Customize buttons
(4) Customize dials
(5) Clear customized settings
Custom Functions 4
(1) Add cropping information
(2) Default Erase option
(3) Release shutter w/o lens
(4) Retract lens on power off
(5) Add IPTC information
684