Rusty this happens if your Windows Display Scaling is set above 150%.
SketchUp currently only supports 125% and 150% (above 100%.)
You will most definitely need to restart SketchUp anytime you change external display settings (and even within SketchUp’s internal OpenGL panel of the Preferences dialog.)
Search the forum of display scaling, others and I have posted external links on display scaling “how tos”.
https://forums.sketchup.com/search?q=display%20scaling
One of which with external links to Microsoft Help, is: