The Detail Component tool places a detail component into a detail or drafting view. A detail component is visible in that view only. You can keynote detail components. See Keynotes.
To insert a detail component
You can add additional detail components by loading them from the family library, or you can create or edit existing ones in the Family Editor. Revit contains over 500 Detail Component Families. They are organized by the 16 CSI (Construction Specifications Institute) divisions.
Detail components can be tagged using detail item tags. To load tags into the project, click Insert tabLoad from Library panel (Load Family).