[NTG-context] Hairline in header

Hello, how to add the hairline (or a kind of the horizontal rule) under the header area? I'd like to achieve something like in the 1.pdf (attached; created by LaTeX). My code till now: --- \setuppagenumbering[location=footer,middle] \setupheader[][style=small] \setupheadertexts[LLL][RRR] \starttext AAA \stoptext --- Lukas -- Ing. Lukáš Procházka [mailto:LPr@pontex.cz] Pontex s. r. o. [mailto:pontex@pontex.cz] [http://www.pontex.cz] Bezová 1658 147 14 Praha 4 Tel: +420 244 062 238 Fax: +420 244 461 038