I purchased the above listed monitor in February of this year. By using the control buttons on the front of the monitor I can select menue-settings-wide screen and then have two options (full) or (aspect). By selecting (full) the full 23 inch screen is displayed and by selecting (aspect) the screen reduces to about 19 inches and is centered on the screen with equal black border on each side.
Using Windows XP this function worked great but I have now gone to Windows 7 and it will not work. In both cases I have the resolution set at 1920x1080 (recommended).
Download the latest drivers for your Acer H233H to keep your Computer up-to-date.
Acer tells me it must be a Windows 7 problem but haven't been able to find anything about the problem on the net nor could the Geek Squad give me any help. Anyway out there able to help? Thank you, Dick.