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Full user review
"This should come with the MacOS"
It's essential to understand the keyboard shortcuts, provided by MacOS. This provides you with all you need to know in one press of a button.
None. None at all.
Everyone should have this as a log in item. I no longer need to STUDY the plethora of the keyboard shortcuts available in MacOS. If i'm curious about what keyboard action can be used, at any one time, in any particular dialogue box, I can call up a complete list of actions, by holding down a key (that I can pre-assign). No studying needed!