When I first starting testing specific text areas in search, there was a long list of choices. Now I have 3:

Closing and restarting search doesn't help. Quitting and restarting L4 doesn't help.
Here's what I think I did: Previously I search once by footnote and then later by author. Today I searched by surface text and then again by clicking in "all." The next time I clicked on "all text," my choices were limited.