@CGMRUNAL the whole purpose of a custom enumeration is to be used in a persisted Custom Attribute. So, someone needs to select a value from the enum in the page where the Custom Attribute has been created/published.

What you could do, maybe, is to have 2 different contexts. Users in one context could set the value in the Custom Attribute and users in the other context could only read the value, but not edit.

I’m not sure if this answers your question.