Restore multiple minimized windows?
The opposite keyboard shortcut for the cmd+M is the

cmd + Tab

that will bring up all open windows

keep holding the cmd key

scroll till you find lets say Chrome

still holding the cmd key use up down arrows that will bring all open windows with in that app.

THIS QUESTION WAS ANSWERED HERE:

Actually there a multiple ways doing the minimizing and the maximizing all windows at once.

I prefer the cmd + F3 to hide all at once. Then F3 to show all.

Then there is a 3 party app called Witch.