Place your cursor at the top of your document, and then open the Advanced Find and Replace dialog box. In Word 2013 or Word 2016, press Ctrl + H. In Word 2016 for Mac, on the Edit menu, click Find Advanced Find and Replace. In the Find and Replace dialog box, click the Replace tab.

1. Line Separator Word
2. Insert Line Separator In Word
3. Line Separator Text

Enter three or more special characters on a new line and then press Enter, Word automaticallyexpands these characters to a line. A style of this line depends on the characters:

Line Separator Word

• Three or more '*' - dotted line
• Three or more '=' - double line
• Three or more '~' - wavy line
• Three or more '#' - thick decorative line
• Three or more '-' or '_' - thick single line

These lines often used in Word documents, but you can simply remove them if you understand: this is nota line - this is a paragraph border (for more details seeHow to use paragraph borders and shading).

And you can turn on/off AutoReplace of these symbols to lines. Do one of the following:

• Then Word makes an AutoReplace, it shows the AutoCorrect Options button. You can clickin it and choose Stop Automatically Creating Border Lines:
• Do the following:

1. Note for Mac users: Don’t expect to see a display like the one above in Word for the Mac. Although many Mac fonts contain at least the ¼, ½, and ¾ fractions, the MacRoman Character Set does not contain them, so there are no built-in keystrokes for the characters, and the Symbol dialog in Word won’t show them to you because it is capable.
2. Office Online also works with the Office applications installed on your desktop, so you can choose how you want to work. Use Office Online to dynamically collaborate with real time co-authoring, or if you already have Office, continue working with the full power of Word, PowerPoint, and Excel applications installed on your PC or Mac.
3. This works on all Word packages like 2007, 2010, etc. On all platforms like Windows 7 / 8 / 10. This also works on Microsoft Word 2011 on Mac. Using Images for Dividers. Using image is another option to insert divider image on your Word document. You can create suitable images and insert between elements as an object.

Insert Line Separator In Word

1. On the File tab, click the Options button:

2. In the Word Options dialog box, on the Proofing tab,under AutoCorrect options, click the AutoCorrect Options... button:

Line Separator Text

3. In the AutoCorrect dialog box, on the AutoFormat As YouType tab, in the Apply as you type group, check or uncheck Border lines to turn onor off this option:

See also this tip in French:Comment ajouter et supprimer des lignes horizontales entre des sections du document.