Online Documentation for SQL Manager for InterBase/Firebird
Creating/editing primary key
The Primary Key section of the Constraints dialog allows you to specify PRIMARY KEY constraint definition.
Name
Name of the PRIMARY KEY constraint; the constraint name must be unique within the table.
Fields for primary key
To include field(s) in the primary key, you need to move it from the Available Fields list to the Included Fields list. Use the buttons or drag-and-drop operations to move the fields from one list to another.