Toggling between Preview and Normal screen modes in InCopy (not InDesign)?

I'm an editor using InCopy 17.3 for Mac, and I need a keyboard shortcut for toggling between the "Preview" and "Normal" screen modes in Layout view.

I know it can be done in InDesign (either by typing "w" or with a tool) but I am not finding a way to do it in InCopy. I also can't find a way to create a keyboard macro that could do it. I have found a macro function in InCopy for text expansion, but not for menu navigation.

Do you have any ideas or advice for me? I use the View menu to toggle to Preview all day long and would love a quicker method. 

Thank you for any advice you may have for me about InCopy!