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You can make any number of changes, however no changes will be applied to the public web site until you click thethe Apply ChangesChanges button.
To abandon all changes click the Abandon changes button. You will lose all changes made in the current session.
Changes must be applied before exiting the page, or before using the selector bar to select a different season, otherwise all changes will be lost. This includes changes due to copying titles from a different season, or clearing data from the current season.
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