give us this option within the game itself
currently to set the game to true full screen you have to edit a notepad file and set the resolution settings to 0
if thats done you cant alt tab out of the game either
why should this be in the game?
it greatly reduces fps lag for slower machines, since the resolution can be set lower and it will stretch to fit the screen
the other options are borderless windowed mode and windowed mode
which will shrink the window if you set a lower resolution than your native for the game, not to mention borderless windowed mode eats up more processing power and will slow machines which cant handle it.
honestly i dont even know why this isnt implemented in the game yet, and we have to use notepad for it.