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The Message module is used only on the Private Message pages - /privatemessage/index . It is a System module, so it does not show up on the Module List.
This module is used to display any Messages, Requests, or Notifications for the user. When a user clicks to Compose a New Message, this module displays the Edit screen to select a user and post a message to that user. If the user is viewing Notifications, it will list all the Notifications so the user may go through them and select their Action.
The only option for this module is Results per Page. It controls how many results displays per page in your private messages.
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