just got the 23" Acer H235H monitor and im having an issue with there being about an inch of unused screen. i have it set to the max 1920x1080. the manual they sent with it tells me nothing.
What type of option buttons does you monitor have? Usually with monitors you can adjust the width and height of the picture on the screen. It might be a feature that they have dropped and go with an automated process. It is something to take a look at.