Not the OP, but a related feature -- I could also see use in tying notes to a document or sentence. Sometimes I "translate" a difficult passage to something I

Not the OP, but a related feature -- I could also see use in tying notes to a document or sentence. Sometimes I "translate" a difficult passage to something I can understand (on paper I might write this in margins). At other times, I end up accumulating definitions of terms (or letters) while reading a paper. Today I write those on a separate piece of paper so I can have my definitions table viewable at all times. It would be really nice to have that sort of thing stored and available while I'm working my way through a paper (perhaps similar to the portal feature).