It is possible to duplicate an annotation (select > right click > duplicate). This can be useful when you need a similar annotation with similar references as one that already exists. Generally when duplicating an annotation you will want the new annotation to be visible in the active combined view. However it does not currently work that way, after duplicating you then have to select the new annotation and click "Add to State" so it will be visible. It would be nice if the new annotation is automatically added to the active combined view.