Mac Exit Full Screen

I maximised the application window on my Mac and cannot for the life of me find out how to return to window mode. Any advice?

It happens to me sometimes on a remote screen that won’t size correctly. There I shut down and never maximize again.

On the Home Screen the green circle shows up when you float at the top quarter inch (3rd from the left) float over it and the option to “exit full screen” pops up to click.