Some instruments on the Image toolbar are grouped into the small drop-down panels. These are the tools to select areas on the image surface Selection, to plot the cross sections Sections and to select extended objects Curve selection.

A dropdown tools are marked with the arrows in the right bottom corner of their icon. In order to see the dropdown menu press and hold the left mouse button for a short time. Duration is determined by adjusting the parameter in menu File → Options → Dropdown toolbar delay.