[NTG-context] float in columns

I seem to remember that it was possible to place a figure over the whole width of the page inside columns as for example \startsimplecolumns[n=2] text in 2 columns placefigure-over-fullwidth further text in 2 columns \stopsimplecolumns However, I cannot find with what command this was accomplished. Can someone enlighten me? Hans van der Meer