To create an assembly reference
-click an empty space in the Outliner and select Scene Assembly > Create assembly reference from the menu that appears.
By default, the representation namespace uses the assembly definition file name.
In the Outliner, an assemblyReference nodes appears, represented by an
icon. By default, the new assembly reference inherits the name of the referenced assemblyDefinition node.
Turn on Asset centric selection in the Preferences window. See Selection preferences.
Selecting the representation selects its assemblyReference node.
-click the representation and select Select Assembly from the menu that appears.
You can now access the Scene Assembly menu by
-clicking the representation and selecting it from the menu that appears.
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