[NTG-context] Text with background (overlay with a line by MP)

Hello, I'm trying to create an overlay - text with a line drawn bellow. The following code: --- \defineoverlay[Label][\useMPgraphic{Label}] \startuniqueMPgraphic{Label} path p; p := (0,0) -- (OverlayWidth,0); draw p yshifted -1cm withpen pencircle scaled 1mm withcolor .667red; \stopuniqueMPgraphic \def\Text#1{\inframed[background=Label,frame=off]{#1}} \starttext AAA \Text{BBB} CCC \stoptext --- results in a horizontal line going exactly through the middle of the text. And I'd like to draw it bellow; thus "yshifted -1cm". How to do it? Best regards, Lukas