ps-left-header

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

(ps-get-buffer-name ps-header-dirpart)

Documentation:
The items to display (each on a line) on the left part of the page header.
This applies to generating PostScript.

The value should be a list of strings and symbols, each representing an entry
in the PostScript array HeaderLinesLeft.

Strings are inserted unchanged into the array; those representing
PostScript string literals should be delimited with PostScript string
delimiters '(' and ')'.

For symbols with bound functions, the function is called and should return a
string to be inserted into the array. For symbols with bound values, the value
should be a string to be inserted into the array. In either case, function or
variable, the string value has PostScript string delimiters added to it.

If symbols are unbounded, they are silently ignored.

You can customize this variable.

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