If you have defined a sub-workflow, then you can call the sub-workflow from a main workflow with the To sub-workflow component below.
This can be useful, if you want to divide a large, complex workflow into smaller workflows, or if you want to reuse the same (sub) workflow for multiple main workflows.
The component has only one parameter:
Endpoint unique ID
Here you type the Endpoint unique ID, that is specified on the sub-workflow, that you want to call.
The sub-workflow must have the input type From other workflow.