The behavior of previously
created measures depends on the state of
Keep previous measures.
By default,
Keep previous measures is active, and previous
measures are kept when creating a new one.
To remove the previous measure (that is, the last-created one) every time
that you create a measure, switch
Keep previous measures off. Note that this only
impacts measures created after switching the option off (that is, all existing
measures are kept).
You can turn
Keep previous measures on or off when the icon
appears. Once you modify the state of
Keep previous measures, it is kept for the length of
the session.
The
Keep previous measures option must be off to measure
the angle and arc using three points selection.