Tags a Plant 3D object.
FindAccess Methods
Ribbon: Home tab 
Part Insertion panel Assign Tag
Command entry:
planttag
Summary
You can tag Plant 3D objects such as valves, equipment, and structure to identify them as unique items in a project. Annotation is not supported.
List of Prompts
The following prompts are displayed.
Select a Plant 3D component
Selects a single Plant 3D object to tag. The Assign Tag dialog box displays.