Edges disappear, measurements not accurate, drawing gets small

I have 3 issues with a drawing:

  1. when I orbit, the black edges of the drawing disappear and
  2. the drawing seems to disappear into a tiny format.
  3. Some of the measurements are not measuring correctly with the tape measure. oddly small

First try:
Window > Preferences > OpenGL
uncheck Hardware acceleration
Restart SketchUp

You might also need to try unchecking Fastfeedback, but try them separately.