Copy item from one layout to another

I am new to Layouts in Rhino. After years of exporting to Illustrator, I decided to knuckle down and see if I could finally get to grips with Layouts.

One simple (I hope) aspect alludes me.

I have a single file with multiple layouts, each containing a drawing of a separate component.

I need to copy drawing border elements from one Layout to another. I have used copy layer with objects, the problem being that the copy remains “associated” with the original Layout and will not display when I change to another.

There must be a simple solution I’m overlooking and would appreciate a nudge in the right direction. Many thanks.