You can access and share assemblies using tool palettes, catalogs, or assembly drawings.
For example, you can create an assembly in your drawing, and then drag and drop it to a tool palette. Once it is in a tool palette, you can copy an assembly from a tool palette into a catalog. You can create a tool palette or a catalog that contains multiple assemblies, and then share that tool palette or catalog with others.
You can also save an assembly to a drawing file, and then drag and drop that drawing file into your current drawing.
Tutorial: Saving and Sharing Corridor Assemblies
The assembly is inserted as a block. Explode it to create the assembly object. When the assembly object is created, it appears in the Assemblies node in Prospector.
Click Tool Palettes
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Click Tool Palettes
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Click Content Browser Find.