You can use the predefined workflows installed by the Horizon vRealize Orchestrator plug-in, or you can copy workflows and customize them.
The folders and workflows that appear in the Horizon folder are the predefined workflows delivered by the Horizon vRealize Orchestrator plug-in. To customize a workflow, create a duplicate of that workflow. Duplicate workflows or custom workflows that you create are fully editable.
For information about the different access rights that you can have when you work with the Orchestrator server depending on the type of license, vCenter Server see Installing and Configuring VMware vRealize Orchestrator.