There's not one, but two easy ways to insert a horizontal line into a Word document.

Add a vertical line in Microsoft Word to draw attention to special content or help define elements.

Let AutoFormat Help Provided it's switched on, Word's AutoFormat feature makes it possible for you to add a line with just four key presses.

This tutorial shows you how to select all or specific words, lines or paragraphs in Word using the mouse, touchpad, and Select Menu, ...

Are lines too close to each other in your document? Find out how you can change Line Spacing in Microsoft Word the easy way.