A horizontal line is optional, but it can unify a page and give its heading more emphasis.

• Place the cursor at the end of the heading, and press "Enter". The cursor will drop to a new line.
• Move the pointer to the word "Insert" at the top of the page, and click on "Insert". A menu opens down.
• Move the pointer down to "Horizontal Line", and click on "Horizontal Line". A horizontal line appears.

Resulting image of above actions:

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