MS Access ER diagram I have database scheme for Microsoft Access. I'm interested how I can convert the scheme into an ER diagram? Is there any tool that can do this based on scheme relations?
Visio Professional(prior to 2013) has an option to reverse engineer a database schema.  I have used this in the past for Access as well as other databases.  However, it does mean you have to purchase the professional version.

You could also migrate the database schema into SQL Server and leverage the database diagrams found there.  You should be able to use SQL Server Express for this.