enable TCEFORM.table.field.config.readOnly = 1
In t3lib_tceforms::t3lib_TCEforms() you have a whitelist definition that allows tca field configuration to be overridden by TSconfig => allowOverrideMatrix
But it does not allow to define readOnly for some fields.It's needed for the following scenario:
- A Backend User should not have access to a certain field
- When he does not have access rights to this certain field he cannot copy a page with the content of this field.
- He must have access to this field but without permissions to write.