How to have my screen display a square as a square, not a rectangle

Just got a new monitor and Rhino5 draws a square on the screen as a rectangle.

I am sure it is correct mathematically but not when I use a ruler on the screen.Two sides are about 90% of the other two.

How can I adjust Rhino5 so that it displays a square as a square.

Thanks,
Tristen

Sounds odd… If you have a real square in an ortho viewport, it should be absolutely square - in Rhino. You may have a problem with your screen resolution. Are your display settings configured to run the monitor at its native resolution?

–Mitch

Thanks, that was it.

Somehow, it was set to 1680x1050, not 1920x1080.

I have never set it to that resolution so I did not even think about that, thanks.

Tristen