Introduction - If you have any usage issues, please Google them yourself
1. Through mouse drag and drop and pop-up dialog box to complete entities, attributes, links, as well as drawing parameter setting 2. Drawing entities, attributes, links provided to check the legality of 3. The graphics on the drawing drag, reset size, delete 4. through the Properties dialog box on the entities, attributes, linked to various parameters re-set 5. serialization of data 6. will be drawn to complete the ER diagram into a database script