There is a number of things like that in the game. For a long time I didn't know how to access the skills list. I'd see people do it a lot in YouTube videos but couldn't figure out how to get there. Now that I know, I also know that skills don't matter much.
I still don't know how to roll/dodge. I could easily go look and find out but now my game style is set and I probably would use it if I knew. Say, "Lovey".