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You should try to delegate your workload by allow other users to become Topic Admins, Contributors or Editors of a certain topic. You assign them in the same way that you assign Audience Members (see Announcement Portlet Admin Guide Topic Permissions). Additionally, a diminished UI is provided for each type of role. For example, contributors and editors cannot see the "Permissions" section of the Topic management screen. See the chart below for the differences between roles.
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