Creating the composite roles
Composite role: A group of one or more roles for administrative purpose is refereed as composite role.
Specify the description
In composite role it doesn't contain authorizations tab.it is nothing but group of one or more roles.if they need to change in composite role i.e only in menu tab.
Specify the roles
Assigne this composite role to the existing user.
Click on Read menu tab.when you click on this read menu tab then it will fetch authorizations from the single roles.
Now log on with that specified user.