Printing plain text with exact positioning on Windows

[alejandro]

Did you mean borderless printing?
Every printer needs his margins, some more some less. Some printers have the 
ability to do borderless printing but usualy they can do it only on special 
or photo paper. So you can adjust the pdf as you wish, even with no margins, 
and then try to find under printer options "borderless printing". That is 
why I didn't understand :-)) it is a printer thing not pdf!