What you got there?

You know that crap when you set up your trade hall, where you place and break profession blocks to get the desired trades? (I'm talking about librarians.)
You know that step where you have to enter the trade screen with a villager after placing a department? Personally, it annoys me, and it's impossible to do it using just the mouse.

My mod solves this problem. A tag appears above the librarian showing the books that villager is selling (this tag updates if the villager has new trades).