I use this glass screen protector which is a perfect fit over the display area. It doesn’t cover the black mat area.
14" Laptop Screen Protector
https://www.amazon.com/dp/B09QXC86J8
Regarding the wasted space, I set my alignment to top, turn on Show Library Window, and park my set list or song list down in the empty space.
14" Laptop Screen Protector
https://www.amazon.com/dp/B09QXC86J8
Regarding the wasted space, I set my alignment to top, turn on Show Library Window, and park my set list or song list down in the empty space.