# HEADER

> [HTML Version](header.htm)

**HEADER = <Boolean>**

(Unix only) HEADER _may_ invoke a printed header at the top of the first page or all pages. Like BANNER[pq](keyword-types.md), its actual implementation is up to the spooler, and may require that additional switches be passed after the printer device name (see [DEVICE](device_sp.md)[pq](keyword-types.md). The default is OFF.