A detail component family consists of components added to detail or drafting views, and they are visible only in those views. They scale with the model, rather than the sheet. Detail components could include a 2X4, a metal stud, or a shim.
Before reading this topic, familiarize yourself with families. See Creating Loadable Families.
The following procedure is a general procedure for creating a detail component family. Your steps may differ depending on your design intent.
For filled regions, select the filled region and click Modify | Detail Items tabMode panel (Visibility Settings), and select the views in which the object will be visible.