Menu bar hidden

I have had the Edit menu visible previously, but apparently did something to hide it. That's what brought me here, and thanks to mkmarl01, at least I have these other icons to use now! But if someone has a clue how to hide and "unhide" the menu bar that is normally visible above "Home," I would be happy to hear about it!

[Branched by moderator. Title renamed was "Re: Undo Button?"]