Users have several ratings: correspondence, live, blitz and overall. Suggest that in addition to the nominal rating, the three others be displayed over their respective domains on the Rank/Game Duration Plot.
Value of this varies depending on whether there’s variance in the user’s performance. However, since OGS goes to the trouble of computing these different ranks and maintains a 4 parameter graph in Profile, it makes just as much sense to do the same where it has a practical use.