Greeking text
When display capabilities are not sufficient to show text at a small size, Fred4 displays the text as a dimmed bar. This is called greeking type. Any type at or below the specified type size is replaced on-screen with non-letterforms that act as placeholders in the artwork.
Choose Edit > Preferences > Draw, and then type a value in Greek Type Below, type a value.
Greeking guides
Choose Edit > Preferences > Draw, and then type a value in Guides/Frames limit, type a value of the zoom below which you want guides and frames not to be drawn.