I'm currently writing my thesis and I have come up with old thesis that have an end mark at the last chapter. It usually is a small centered sign.
So, my question: should I use it? is it a normal practice? ---Please bear in mind that there is nothing about it in my school's requirements, so anything is possible.
...extra question: Do you happen to know what end marks are better for a technical document, i.e., a PhD Thesis?
EDIT: Here is the last page of Lev Bishop's PhD thesis so you can see what I'm talking about. (Full thesis here: http://www.levbishop.org/thesis/Bishop-thesis.pdf)