The specific methods are as follows:
1. Double-click the document to delete the word separator line.
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2. Click the Page Layout menu and select Column. In the column drop-down list, select More column.
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3. In the column menu that pops up, find the small box in front of the dividing line and remove the hooks inside.
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4. After removing the hook in front of the dividing line, click OK to remove the file background cable.