@im5150 KODI has 2 sets of files /home/pi/.kodi/ and /usr/share/kodi/If you are looking to change your skin it should be in /home/pi/.kodi/addons/skin.yourskin Notice it says dotkodi in the first and third file path. These are hidden. You need to show hidden files to see these in a desktop environment.
Got it sorted ,I plugged the raspberry pi3 into my HD TV and the screen was able the handle the default 1920x1080 resolution.Then went into Kodi settings and set the resolution to the nearest to 1280x1024 which was 1280x720.
Another leason learned on the Pi.