How I can hide or remove (from ~) tags when I copy/paste Diagram Elements in Enterprise Architecture?

In Enterprise Architecture, when I copy and paste elements from A diagram to B diagram,
(from A diagram) <- I want to remove(or hide) this tag which is placed below elements.
how I can do this?

I tried to find this option in menu Start > Preferences but I couldn’t find it.

>Solution :

You can control that setting through the diagram properties: Diagram | Appearance | Show Namespace