So I tried connecting my VR using Vurtual Desctop, and everything was going well until i disconnected it and my GUI was small. I went to change it but the slider was gone. What should I do about this and how do I fix it?

So I tried connecting my VR using Vurtual Desctop, and everything was going well until i disconnected it and my GUI was small. I went to change it but the slider was gone. What should I do about this and how do I fix it?