Newbie questions

That means you do not have enough window real-estate. You can switch to a higher resolution in Windows.
Of my three laptops, I had the same problem with one of them, and all 3 have the same size screen. The i7 & i3 Dells were good, the i5 Acer was not. It is not a Lightburn thing.
An option is to add an LCD monitor/TV with HDMI input as a second display. These are fairly low cost on Amazon these days.