Fivem stuck in windowed mode?

FiveM Discussion Bug Reports
2

Check in your GTA V root directory (where gta5.exe is located) if there is a commandline.txt.

  1. If yes, open it and edit -windowed, make it -fullscreen.
  2. If no, open a notepad and name it commandline. Write -fullscreen and save it as .txt to you GTA V root directory.

This post should be in the Technical Support, not in the bugs I think.