formatting – How to Create a Shortcut to put a frame around an equation

I use mathematica for typing Physics and other notes. For important equations, I prefer to put a box around them. To do so I use either:

  • Insert-> Typesetting -> Add Frame from the menubar
  • Palette -> Writing Assistant -> Writing and Formatting -> Cell Properties -> Frame

This is tedious when you are rapidly taking notes. I desire to be able to assign the command(s) to a shortcut key. Is there a function or command that I could assign to a shortcut key?