How to hide workflow models in the start workflow list?

AEM 6.x

Steps

Workflow models are hidden by setting Workflow: System tag on the model.

1. Go to the Workflow Models console: http://host:port/libs/cq/workflow/admin/console/content/models.html/etc/workflow/models
2. Click Page Properties on the AEM Sidekick.
3. Add Workflow: System tag into Tags/Keywords.
4. Remove Workflow: WCM tag (and other tags) from Tags/Keyword if any.
5. Click the OK button.
6. Click the Save button in the top left of the editor page.