1.You can make a link from a piece of text (or a word) to another page, a file, another website or an email address.

This is very easy if you use the Rich Text Editor. Simply mark the text and press the "Insert Link" button :

 

2. A popup opens in which you can choose which type of link you want to create. In this case choose the tab "Page" and click on "Advanced User" in the navigation tree to create a link to the "Advanced User" page.

The popup should close itself and now you can see that the text you marked is linked:

 

3. On the online website, this will produce a link as you would expect. Click on it and you will be redirected towards the concerned page, which was "Advanced User" in our example: