I don't think shift+b is even a thing anymore. Should probably be removed. As for how the ranking system works, I think there is currently no good way for people to even know. That's a shame because it's a pretty good system that lets you progress at first so you don't feel terrible, but ultimately does shake out to be skill-based. Also I think the bit about how you can progress through student ranks with any character once (no need to do it with all the characters), and then how it splits into separate rankings for each character...is important for new people know. The best to way explain it would be an entry in the guide (which is currently a mess), and then on the Play tab where it says like "Student 1" or whatever, a small link next to it to the guide. The link would either be a small question mark icon or the text "what's this?"