Here is the link to a small (but I hope useful) free add-in I developed to set on/off notation on a set of selected elements in an active Diagram. Notation supported are Actor, Circle and Rectangle.
As an Archimate (almost power) user, I find it very time saving to be able to remove or add the Rectangle notation to a complete diagram elements at once.
Hope it will help & that you will enjoy it (I have seen a couple of posts on that need)!
Follow the link: http://www.thilloy.com/downloads.html to download The Diagram Objects Notation Utility Tool ()