Hi Jamal, I think you want to inspect each port of a transformer. Read up about how to use the 'feature caching' option when running workbench
I recommend using the standalone Data Inspector. Just click the last icon on the right of your Visual Preview window.
Visual Preview displays what you select to display. In the first case it displays your Reader (Q table), when you click on a different transformer (AttributePivoter) it displays the data coming out of that, and so on.
What I wanted here is have this option without the need to launch the FME Data Inspector