Views are useful for allowing users to access a set of relations (tables) as if it were a single table, and limiting their access to just that. Views can also be used to restrict access to rows (a subset of a particular table).
You can think of a view as virtual table. It does not physically exist, but works like a real table. Usually it is created by a query joining one or more tables.
With Database Designer for MySQL you can:
Edit a view;
Manage all views within the diagram.