Instructions
Install and run ̶0;Final Fantasy XI̶1; through Steam. This will create the necessary registry files.
Run the ̶0;Final Fantasy XI̶1; config application. You̵7;ll find it in your Steam library, normally something like, ̶0;Steam\steamapps\common\ffxi\SquareEnix\Final Fantasy XI\Tools.̶1; The location of your Steam folder depends on where you installed it.
Run Regedit by typing ̶0;Regedit̶1; into the Start search bar and pressing the ̶0;Enter̶1; key.
Edit the appropriate registry value for the setting you want to change. For example, ̶0;0002̶1; controls the screen height while ̶0;0034̶1; determines whether the game opens in windowed mode.
Save changes when finished.