showla­bels – Show la­bel com­mands in the mar­gin

This pack­age helps you keep track of all the la­bels you de­fine, by putting the name of new la­bels into the mar­gin when­ever the \la­bel com­mand is used.
The pack­age al­lows you to do the same thing for other com­mands. The only one for which this is ob­vi­ously use­ful is the \cite com­mand, but it's easy to do it for oth­ers, such as the \ref or \be­gin com­mands.