 Build panel
Build panel
 (Place a Component)
 (Place a Component)  Model panel
Model panel Component drop-down
Component drop-down
 (Place a Component)
 (Place a Component)  Model panel
Model panel Component drop-down
Component drop-down
 (Place a Component)
 (Place a Component) 
Use the Type Selector to choose the desired component, or load a component family into the project.
Revit provides many pre-defined components. You can create additional components using the Family Editor.