Envelope Publisher
You can use the Envelope Publisher tool to include components from a top-level assembly as envelopes in a subassembly.
You can work in the subassembly using the published envelopes as reference components in isolation from the top-level assembly. The envelope components inherit changes from the top-level assembly.
Multiple subassemblies can have the same envelope. Subassemblies can contain only one group of envelopes published by Envelope Publisher .
When you select a subassembly as a destination for the envelope, an external reference is created to the parent assembly. The Published Envelopes folder displays external reference symbols that indicate the reference state of the envelope.
Envelope Publisher is available when an assembly contains subassemblies. The tool is not available in Large Design Review mode.