I could use some help too

I am new to sewing so don't know all the ins and outs of everything yet. I love sewing vintage clothes and last week finished a circle skirt which I will post as soon as I hem it...and there lies the problem.

I purchased this hem maker last week at a thrift shoppe for $1.oo. I know it will be handy especially for hemming a circle skirt. The problem is I have no clue how to use it. I have searched all over the Internet for a tutorial (I guess not many people are looking for this knowledge. LOL)

I don't understand the markings "1 hem, 2" hem, etc. And then what is the measuring stick used for? Do you measure from the floor up? I feel dense in the head. I know one or more of you gals will be able to help. So thanks in advance.