The links below will display in the white body section of the page, keeping this left border static:
About Us
Products
More Information
Contact Us

Each link above is created by:
1. Highlighting the text

2. Click on Link -> Create Link to URL

3. In the Link To: area, http:// is already prefilled.  Enter the full name of your sub directory page you wish to load followed by " target="TRLX_Middle

There is a space between the quote and the word target.

4. Example: for the "About Us" page I typed:
www.csbsupport.com/demo1a" target="TRLX_Middle