From Demetra Beta feedback:
During Debug, when you do Evaluate Expression on a variable, you can right click
on any field and get a menu that has an entry to copy the value
to the clipboard.
When you hover over a variable during Debug you get a popup with
the value and a click on the "+" gets you a window with the
same sort of view as Evaluate Expression, but a right click
on any field doesn't have a menu. Sure would be nice if it did.