Showing a file such as a .pdf or Microsoft Word (.doc) document is done via linking. See "How To Insert/Edit/Delete A Link" if you need help here.

1. In the editing area, highlight the text that will constitute the link to the file and click on the Insert Link button.

   
    

2. In the resulting dialogue, click on the "Browse Server" button.
    
3. At the bottom of the resulting page you'll see a field under "Upload a file to this folder." Click on the "Browse" button to select a file from your computer and then click OK. Click on the "Upload" button.

   
    

4. Once the file has uploaded, it will appear in the list, and you can select it from there.
    
5. Changes will not take effect until the page is saved.