ps-print-header is a variable defined in `ps-print.el'.
Its value is

Non-nil means print a header at the top of each page.
By default, the header displays the buffer name, page number, and, if the
buffer is visiting a file, the file's directory. Headers are customizable by
changing variables `ps-left-header' and `ps-right-header'.

You can customize this variable.

This variable was introduced, or its default value was changed, in version 20 of Emacs.