Thanks for getting back to me. I'm still having trouble, though, and am wondering if we're referring to the same buttons.
According to my DSS manual, the first three buttons from the left of the upper of the bottom two rows are the page buttons, the first button on the left of the bottom row is the Message Status button, and all the remaining buttons in both those rows are reserved for future use.
The page buttons all work as they're supposed to, moving between the three "pages" of extensions. Whether or not I have the lower left button on or off (which, according to my manual, means whether I'm in Message Status mode or not)makes no difference in the information I get when hitting the "inspect" button. Am I still missing something? Thanks!