There are several ways to insert a horizontal line in Word:

Using the Ribbon:

  1. Place your cursor where you want the line to appear.
  2. Click the Home tab.
  3. In the Paragraph group, click the Borders drop-down arrow.
  4. Select Horizontal Line.

Typing Hyphens or Equal Signs:

  1. Place your cursor where you want the line to appear.
  2. Type three or more hyphens (—) or three or more equal signs (===) in a row.
  3. Press Enter on your keyboard.

Using AutoCorrect:

  1. Type three or more underscores (___) where you want the line to appear.
  2. Press Enter.
  3. Word will automatically convert the underscores to a horizontal line.

You can also double-click a horizontal line to open the Borders and Shading dialog box, where you can customize its appearance.