Once you have turned on the ruler settings, you are ready to add rulers to your website page. You can add as many horizontal and vertical ruler guides as you need to your page to help you align objects and ensure your objects align consistently across your pages.
Here's how:
Drag the horizontal ruler guide to the desired location on your page. You will notice that the ruler guide displays a number of pixels, which is the distance from where the ruler was originally pulled.
Drag the vertical ruler guide to the desired location on your page.
The ruler guide appears on your website page.