Wow !!!
@AmberV - This is brilliant! You never cease to amaze with your crystal clear explanations. Makes me realize how much I do NOT know about Scrivener despite using it for 16 years!
I setup the Compilable Subdocuments keyboard shortcut and, voila! - now I have the toggle I was looking for. THANK YOU !
I also setup the Note template and will use that moving forward.
@Kevitec57 - I do appreciate your response, but my setup is quite different from yours. As Amber wrote in the post she linked to above: