Sorry for my bad english i hope you understand what i mean

i am not able to change the size of my gamescreen.
if i take the Graphic resolution with 100% (in my case 1600x900) the left side of the screen is to big so i can´t see the ingame menu.
in every other setting the size of the screen stays so i can´t change.
meanwhile i even can´t choose 1600x900 only bigger or smaller but no change.