how can i change to full screen mode outside of the game [ Edited ]

[Taco_Vampyre]

I have a rather wide but short monitor for my computer so when I opened Apex Legends I have about a quarter of my game being cut off. Thus I can't ready up and/or change my settings since the apply button is out of my reach. How can I change the windows format to full screen from outside the game so that I can play the game.