Jim,
There are lots of options for changing all the components of a style, then saving the information so it can be accessed either by the MFD or a registration.
Donny is right that you cannot save a transpose via the MFD, but in the time it takes to select the MFD you can transpose the selection. It's just a couple button pushes on a dedicated button.
If sincerely believe that once you increase your working knowledge of the keyboard's operating system you'll find it's among the most advanced arrangers on the market today. Both the S900 and Tyros2 have more features than anyone can possibly imagine.
Good Luck,
Gary
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Travlin' Easy
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)