You can Insert a Link to:
When you insert a link, you'll be given some options.
The Text is the text in your document you choose to link to. Generally, authors choose to have the Flyover display the URL or link address. However, you can add Flyover text which appears on top of the link.
You can choose to have the link open in a new window or have the link replace the current window.
You can insert a link from the formatting bar by choosing Link or by going to Insert > Link.