window mode to full screen mode.

How to change from window mode to full screen? I can't seem to figure it out. Can someone please advise me on how to do that. Currently its in window mode and I have a 34inc Wide Screen monitor.

Thanks, in advance.

In the "Environment Settings" in the launcher and make sure you save. https://gyazo.com/6babc11607a3edb4e4d9d7332f21f3d3