You can merge annotation sets and views by applying an annotation set to a base view or annotation set. The base view must be open and loaded in the graphics area to apply an annotation set. When you apply an annotation set, the base view remains the active view. All the content from the base view remains, including content from previously-applied annotation sets, though some content may be hidden. The view retains the title of the base view. Each annotation set can contain only one of each of these data sets: