Rules, essentially, are straight lines that divide a page, like rulers. They help break down content, making it easier to digest when there's a lot of information on a page.
Once you have logged in, navigate to the page where you intend to add a rule to.
In this instance, the content is somewhat difficult to differentiate. This serves as a prime example of when rules could be beneficial in aiding the user's readability of the content.
In the top admin bar, click on 'Edit Page'.
Once in edit mode, scroll to the bottom of the content and click 'Rule'.
There are no specific settings for adding a rule. Therefore, to add one, simply click the save button.
A rule will then be added to your page. You'll then have the abillity to click and drag the blue bar to your preferred location.
To publish the changes after you have finished editing, click the 'Approve' button at the top of your page.
Here's an example of the same page, but with multiple rules added. Now, you can observe that the content is easier to follow, enhancing readability for your users.