Do you mean you want to have a single setting applying to all fields in the repeater that is the same?
Couldn’t you just a set a value outside of the repeater and use this external variable inside your repeater loop?
If you want the option to override the setting on each individual repeater, you could have a boolean for this and check for that first before using the other value.
I often do this with a tab called ‘Advanced Settings’ to make things a bit easier for the user too.
