We always recommend archiving, or exporting your projects rather than deleting them. See How do I archive & unarchive a stand-alone diagram? or How do I export a standalone diagram? This way you can go back to your project and do some editing. This is safer than deleting all of your hard work.
- From the dashboard, choose diagram from the Show filter to view all of your diagram projects.
- Hover over a project that you want to delete and click the trashcan icon on the right. From the modal window confirm the deletion.
- To delete multiple projects at once, use the checkbox on the left to select then click the trashcan icon on the bottom bar labeled Delete.
- From the modal window, confirm the deletion.