Active and Inactive Status of Annotation
If an annotation is part of an Annotation Element, it can become inactive if all of its Weak references are lost. For example, if an Annotation Element includes a note, and the note is attached to two edges, then the two edges are Weak references. If one of the edges was chamfered somewhere later in the regeneration sequence, this reference is lost and the leader that used to be attached to this edge is not displayed. The note has only one leader, attached to the second edge. However, if the second edge is also lost, the note would lose its last remaining leader and become inactive.
Inactive annotation exists in the Model Tree, but it is not displayed on the screen.