Perhaps they (the OP) assumed that many of those who post here also have FB accounts and may know how to answer that question, as this site seesm to be frequented by the tech savvy.
Personally, as I don't have a FB account (and never had one), I am unable to offer an answer.
However, recalling the days when I dwelt in the groves of academe and donning that hat I wore as a former teacher, I will say that there are no (or few) stupid questions; if you don't know how to do something, simply ask. In the absence of learning by example, how else can you hope to learn?