You are absolutely correct, that clearly states that that the 'Tools' button should be customizable. If you get a chance check out page 4 of the manual. (Hard copy and the PDF Version)

When I first read this passage, I was under the impression that it was stating that the 'Tools' button cannot be changed. However, after reading it again I believe it is stating that the button has a predefined function, but that it can be changed.

Thanks for pointing out the passage in the help file.

-Aman