[NTG-context] How to control the space between the bottom of the frame and the text?

Hello, I find that the text is near the bottom line of the frame, how to add a little space ? Thanks Fabrice \defineframed [ACFRAME] [frame=on, width=fit, align=flushleft, location=low, background=color, backgroundcolor=lightgray] \defineenumeration [exercice] [text={Exercice}, headstyle={\bf\feature[+][f:smallcaps]}, headcommand=\ACFRAME, numberconversionset=ACCONVERSION, width=fit, stopper={.}, alternative=serried] \defineprocessor[ACPROCESSOR][color=red] \defineconversionset[ACCONVERSION][][ACPROCESSOR->n] \setupbodyfont[pagella] \starttext \startexercice \input ward \stopexercice \stoptext