You can now link a detailed process to an Execution Node to represent hierarchical process structures. This allows you to manage sub-processes nested within a larger process.
In the Start Node sheet on the detailed process side, you can view the parent process that references that process and the source node of the reference. The association can be removed from either the parent process side or the detailed process side.
For unsaved processes or Execution Nodes, a message will guide you indicating that the setting can be configured after saving.