The Schema Indices tab lists the indexes of the selected database. Besides the index names and the table the index belongs to, you can also see the index type, whether values are unique, and whether NULL values are allowed. You can also get this information by issuing a SHOW INDEX SQL command in a command-line client (see SHOW DATABASES Syntax). For more information about indexes, see Column Indexes.

To see the columns that form a given index, double click on the index.