How to shift a PDF content up down left or right using iTextSharp

问题

I am wanting to find a way that I can use iText sharp to move or "shift" the content of a PDF in any direction. I am currently adding overlay art to PDF's using the Stamper and such, and have noticed there is a positional coordiate system in the method "AddTemplate() like so:

AddTemplate(pageNumber, x, y)

The problem is that I need to use measurements of inches. Like a 10TH OF A INCH, ect. How can I do this and how much is the x/y corrdinate move n it's position at the current moment if I do :

AddTemplate(i, 15, 23)

Thanks in advance.

来源：https://stackoverflow.com/questions/23790532/how-to-shift-a-pdf-content-up-down-left-or-right-using-itextsharp