I assume the viewport is the window we look through to see the 3D objects. I'd like to increase the size of this window without increasing the resolution of my game.
Heres my game normally: 
When I go to display settings and increase the "window width" and "window height" it does increase the size of the window, but it also increases the resolution as you can see by the smaller text:

How can I increase the size of the window without increasing the resolution?
I don't seem to have a viewport node in any of my scenes. I'm basing my game off of Zylan's blocky voxel game demo, so its possible its there and I just cant find it?
Thanks!