If you are running into an issue with your sim being in full screen but not covering the whole screen. Here are a items which might be causing the issue
Try updating your graphics card drivers. If this does not work follow the steps below
Change High DPI settings. - WINDOWS 10
Right click the application for Run 8
Go to the properties section and then the compatibility section.
In the compatibility section there should be an option that says "Change High DPI Settings".
Check the "Override high DPI scaling behavior box"
Click "OK" to close the window
Click Apply, then "OK".
See below screenshot for an example.
Change DPI Settings Options
David Highball Run8 Staff Member
Instrument Rated Commercial Pilot
Train Enthusiast
Computer Specs:
Intel Core i7 9700K Coffee Lake 3.6 Ghz| Nvidia GeForce GTX 2080 8GB GDDR6 | 16GB RAM | Windows 10 64 Bit