It sounds like what you're looking to create is called an "anchor tag." The two components of setting this up are the target text and the link. When the link is clicked, your user will jump down to the target text.
1. The link:
The easiest way to create the link is by using the hyperlink tool in your WYSIWYG editor, and entering '#target_name' as the Link URL. For example, I've set "#intro" as the Link URL for this word: Intro.
2. The target text:
To create the target location, you'll need to open the HTML source code tool and add <a name="target_name"></a> wherever you'd like your users to land.
For example, I've added <a name="Intro"></a> to my Intro header so folks jump to the introduction when they click the link "Intro" at the top of my page.