Toggle Application

This Keyboard Maestro macro will start Safari, or if Safari is already running, it will toggle the visibility of Safari.

It is triggered by F1 — Which can be changed in Keyboard Maestro.

I have a number of these macros set up for my most used programs.

Here is a short video showing the macro in action:

I use this macro dozens (if not hundreds) of times each day. I hope it helps you!