Joomla Pagebreaks and How to Use Them

Go to Administrator >> Content >> Article Manager and open up any long article.

Place your cursor in the text at the point where you want the pages to split.

Scroll to the bottom of the page and click "Pagebreak".

Select a title for your new page and click "Insert Page Break". The second field called "Table of Contents Alias" will be the URL for this second page.

Keep clicking "Pagebreak" until you have split this article as many times as you wish. Each time you do, you should see a grey line across the page. When you're finished, click "Save".

Now when you visit the article on the front of your site you should see two special items:
1) "Article Index" which serves as a table of contents to the article pages
2) Prev and Next buttons at the bottom of the article for people to move on to the next page