[NTG-context] How to switch off the numbering of a float in a CLDocument?

Hi all, I wanted to place a figure in a cld. The example in the cld manual does not reveal how to influence bahavior except for the caption. context.placefigure( “caption”, function() context.externalfigure({i}, { width = "\\textwidth" } ) end ) Can anybody enlighten me? Kind regards Willi