Hmm, I have no clue what you are doing wrong 
But keep in mind that you have to stay in the object when you are moving the pivot -> this is a little bit tricky when you just have some few vertices (e.g with a cube)
Hmm, I have no clue what you are doing wrong
But keep in mind that you have to stay in the object when you are moving the pivot -> this is a little bit tricky when you just have some few vertices (e.g with a cube)