Why is there no effect of the yscale parameter in \externalfigure when the width-parameter is given? In the MWE it is the intention to stretch the height of the figure by a factor of two. But nothing happens. Leaving out the width does stretch the height, but then it becomes too wide.

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Test \tex{externalfigure} scaling - \ConTeXt\ \contextversion
\blank
\type{\externalfigure[test][width=0.50\textwidth]}\crlf
\externalfigure[test][width=0.50\textwidth]
\blank
\type{\externalfigure[test][width=0.50\textwidth,yscale=2000]}\crlf
\externalfigure[test][width=0.50\textwidth,yscale=2000]
\stoptext