AgileApps Cloud - removing the "Add record" button from subforms/related information


I have a list of Case objects whose forms allow users to add child records through subforms.
After creating and saving the Case, I’d like to make the entire form “read-only” for every user, also in the subform/related information sections. Thanks to layout rules, the operation is pretty easy on the Case object form, but I cannot prevent users to add new related records through the “Add record” button in the subform section.
Is there a way to do that? The goal is to make my Cases fully read-only after users create them, so nobody should be able to add new child record.

Thank you in advance.

Hi Francesco,

When User is assigned with any Access Profile which have only records view and create permission, then the Cases will be fully read-only after creating by this particular User.

Shweta Singh