I am a new user of Zbrush and one of the best things apart from its an amazing piece of sculpting software, they have added an explanation of every button, function displayed, so you just hold down the control key when hovering over the item you want to know what it does or remind yourself and a dialogue box pops up.
Simple but effective and because its instant you use it, rather than having to search online. I appreciate their program is rather more complicated than yours, but its good as things change.
Chris