It's not the resolution setting - You need to go into the graphics card properties, example: NVIDIA Control Panel (right click on Desktop), and select the Adjust desktop size and position option click here
Lotvic. I had previously tried to do what Brink suggested. Unfortunately it only moves the screen position, to left or right, up or down, it does not appear shrink the screen, and I was not able to find anyway of reducing the size of the Window.
According to Acer, the Native Resolution is 1920 x 1080, but this produces a picture that is about 5mm larger, all round, than the Screen