We recommend all members to do the following for best screen optimization

Open Kodi -> AstreamWeb -> Apply AstreamWeb Settings

for Kodi to reach your screen fully you can calibrate Kodi:

Open Kodi ->  AstreamWeb -> Screen Calibration ->adjust the screen corners using remote arrow buttons. click select to select another corner. 
here is a video tutorial on how to: https://www.youtube.com/watch?v=7lSDk7Dnyjk