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  1. edit the table of contents to remove its protection:
    • right click on the table of contents and select Edit index;
    • under the Index tab, uncheck Protected against manual changes; and
    • click OK.
  2. place the cursor at the beginning of the table of contents;
  3. press the ← Backspace key to delete the line break; and
  4. edit the table of contents to protect it again.