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You can find common and advanced list settings by clicking the "Settings" tab from your list management page.
List Identity
The first tab under settings, "List Identity" is how the list appears on the main Mailman site. Here, one can decide if the list should be displayed with the other mailing lists, change or set a list description, create a longer longer synopsis about the list's purpose, change the display name, and change the prefix that appears in the subject line.
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