# Define groups

Note: This section explains how to add groups to a manageable security realm (for example, the File realm) in the CompatibilityRealm. If you are using a security realm that is not manageable through the WebLogic Server Administration Console, you must use the administration tools provided in that realm to define a group.

To define a group in the Compatibility realm:

1. Expand Compatibility Security > Groups page and click New.

   The Create a New Group page appears.

2. Enter a name for the group and click OK. Oracle recommends naming groups in the plural. For example, Administrators instead of Administrator.
3. In the Summary of Security Compatibility: Groups page, click the name of the group.
4. To add to a group's membership, select users or groups from the Available column and use the arrows to move them to the Chosen column. .
5. Click Save.