Install the Software for the MS WDA from the Store and it has adjustments there...I just purchased a Microsoft Wireless Display Adapter and when I pair it with my surface book and TV, the display does not fill my entire HD Tv screen....almost looks like the image is 4:3 instead of 16:9.
Can't find any setting to change it, even with the adapter software.
your TV might have a PC setting on it. Check the TV settings. My Samsung TV has a PC setting for it to fit the screen.thanks...but the settings in the app don't change anything..just make display bigger, not wider