Hi, testing this mwe I’d expect some indicators detecting overfull lines. At least on my machine (ConTeXt ver: 2022.01.21 20:13 LMTX) nothing happens: \setuppapersize[A6] % Tell ConTeXt where the windmill picture is \setupexternalfigures[location={default}] \version[temporary] \section{Slithy toves} % Top right of page will show successful reference '< fig2' % Left margin will mention unsuccessful reference 'figNothing->' See \in{Figure}[fig2] and \in{Figure}[figNothing]. % Top right of page will show new-created anchors '> fig1' and '> fig2' % Top right of page will show successfully placed floats \placefigure[here][fig1]{First windmill}{ \externalfigure[mill][width=1cm] } \placefigure[here][fig2]{Second windmill}{ \externalfigure[mill][width=1cm] } \startcolumns[n=3] % Overfull lines will have slugs in colum margins. \input linden % Underfull hboxes get no warning x \stopcolumns Steffen