How do you Zoom in game window?

I am trying to fit it pixel perfect, so how would you zoom without putting your eyes direct on the Monitor which is very eye straining.

if(GUI.Button(new Rect(1531, 352,241,237), "", buildButton)) { // Top #1
			audio.clip = Beep;
			audio.Play ();
		}

Trying to align the buttons correctly, if I can zoom I don’t have to get so close to the Monitor. Like in photoshop I can zoom to get the exact pixel position.

or

http://support.apple.com/kb/PH11488

Depending on your platform.