Canon EOS R5C Manual page 758

Operation problems
I cannot adjust settings with <
Press the <
Check the [ : Multi function lock] setting (
Touch operation is not possible.
Make sure [ : Touch control] is set to [Standard] or [Sensitive] (
A camera button or dial does not work as expected.
Check the [ : Customize buttons] and [
> button to release the Multi-function lock (
>, < >, < >, <
).
: Customize dials] settings (
758
>, < >, or <
).
).
).
>.