MSCAD 2002 and 04: Zoom Extents Shows Blank Screen

This is sometimes accompanied by a frozen cursor in the drawing area.
It may be that your drawing has some points, text or line work out near Mars (coordinates
with very large values that may have been added, or moved there, accidentally.) If the cursor is
frozen you can’t zoom and pan to find the points causing the problem. We just need to fool
MSCAD into zooming in on your drawing, and erasing everything outside your view.
The steps differ slightly for different versions, and are detailed
individually in this article.