Hi I finally got hold of a 27" 2560 x 1440 Acer monitor with USB-C. It is great except for the fact that it will not display the screen edge-to-edge, whether or not the macbook is closed. Does anyone know why this is? (there is no slider in system settings to expand the screen size to fill the screen for some reason). It's a little difficult to see but the line around the edge is most visible at the bottom of the attached photo. Another issue also seems to be that the screen goes blank and then reappears (without input indicators on the screen appearing) for a few seconds at random times. Any advice would be appreciated, as always!