If necessary, click above or below the Selected-Segment to see the Motion-Law in the Motion-Law Selector box.
You can also select the motion-law in the Segment-Editor.
Motion-Law Selector drop-down.
After you click a Motion-Law, it remains as the focus. Thus, it is easy to accidentally change the Motion-Law. For example, if you use the mouse scroll-wheel you will scroll AND 'select' all of motion-laws, in turn.
Thus, after you select a Motion-Law, it is very important to: