<!DOCTYPE html> <html> <head> <style> hr { display: block; margin-top: 0.5em; margin-bottom: 0.5em; margin-left: auto; margin-right: auto; border-style: inset; border-width: 1px; } </style> </head> <body> <p>A hr element is displayed like this:</p> <hr> <p>Change the default CSS settings to see the effect.</p> </body> </html>