Have to restrict users from editing the records in a related list

[vhari2]

I have a related list in a form pointing to a Table A . There is a UI action to select the Existing records from Table A into the related records list . Now once the user selected existing record he should not be able to Edit that record

1) wrote write acl in Table B to restrict access . But when I did that the UI action is not being visible to add existing ones . But I need that action and also restrict access . Please help 

[SanjivMeher]

You can right click on the Related List Header and select Configure->List Control

And change List edit type as Disable List editing and save the list control

[vhari2]

I did that . But the user is able to open the record and edit it . I totally want the user to stop editing the record not just list edit

[ARG645]

Make a Write ACL on Table A

It should work. Making a Write ACL on Table B wont work, as it will restrict Table B alone. 

[SanjivMeher]

When you click on edit from Related list, thats also an edit. So basically you would need to create ACL and only allow the field which stores the parent record editable.