Short-Cuts (accelerators), like toolbars, are a quicker way of running menu commands. Every accelerator has an equivalent menu command. These commands are listed to the right of the menu command in the menus. Click on the Format menu and you will see that to change the paragraph back to Action, you can press ALT-A instead of clicking on Action in the menu. Press ESC twice to eliminate the menu. Then press ALT-A to change the paragraph back to Action.
Accelerators and function keys are generally the quickest way to write a script. And you can do virtually everything (and definitely every common command) using just the keyboard. The more of these you learn, the faster you will be.