I don't really understand how font's work in DraftSight.  I have a .dwg file that I was successfully editing all day yesterday.  When I came in an opened it today all of the dimensions, notes, and other text is not visible.  The entities are still there with the text values but they don't display.

There are a set of Simplex font text showing up but the rest of my text is in Arial and 'Edit Note...' wont save the changes I make to my font styles.

This is very frustrating.  What's going on here?

Edit: When I make a change to the fonts all the notes appear for a moment but when I zoom in or out they all disappear