Just going through some of the prep work ahead of time. and this is from a sculpting n00b perspective ( im firing way above my capability at present, nothing ventured nothing gained ;))
as things progress as they invariably do, if working through the prerecorded lectures (im just working through the characture, lots of fun btw heh), probably telling folk how to suck eggs, but thought it pop it in anyhoo the change revisions to the Dyntopo tool if your using 2.79 and wondering what the references relate to.
https://docs.blender.org/manual/en/dev/sculpt_paint/sculpting/adaptive.html