Based on the research, I need to inform you that there isn't currently a way to configure Prefect server to hide subflows by default. The visibility of subflows is a core part of Prefect's UI design to help users understand and debug their workflow hierarchies. However, I can suggest a few alternatives: 1. Use the UI's filtering capabilities to focus on specific flows when needed 2. Structure your flows to minimize the use of subflows if visibility is a concern 3. Consider using tasks instead of subflows for operations where you don't need the additional monitoring capabilities that subflows provide If this is something you feel strongly about, you might want to consider creating a feature request on the Prefect GitHub repository, as it could be valuable functionality for other users as well. Would you like me to explain more about any of these alternatives or help you with a different approach to managing your workflow visibility?