As you know, in a Collapsed Sub-Process, the details are not visible in the process diagram, you may press Ctrl and click it to execute the hyperlink, then you will see the details on another page. It makes the visualization of the business process a lot easier.

What is a collapsed subprocess?

Still a subprocess can be expanded or collapsed, which basically means that its content is either always visible or hidden.

What is a sub process?

Definition of subprocess : a process that is part of a larger process The wire transfer process is divided into two subprocesses: international and domestic wire transfers …— Mohit Sharma.