See an enlarged view of a specified part of a model.
You can add a callout to a plan, section, detail, or elevation view. In these views, the callout tag is linked to the callout view. The callout view shows an enlarged version of part of the parent view, and provides more information or details about that part of the building model.
You can add a detail callout or a view callout to a plan, section, detail, or elevation view. When you draw the callout bubble in a view, Revit creates a callout view. You can then add details to the callout view to provide more information about that part of the building model.
To add a callout to a view, a callout head must be loaded into the project. The callout head is part of the callout tag. See About Callout Tags.
The view in which a callout is drawn is the parent of the callout view. If the parent view is deleted, the callout is also deleted.