Registrations are treaded as files .... all the above can be done in DISK mode.
* Press DISK.
* Press DISK UTILITY (to dislay the COPY/MOVE/DELETE ... etc functions.
* Scroll down to the REGISTRATION folder and press ENTER to display it's contents.
* Scroll to SINGLE REGISTRATION folder and press ENTER to display its contents and here lies all your registrations.
* Select the ones you want to DELETE/MOVE and perform the action.

Usually, the REGISTRATION function stores everything including the transposition value ... same as if you were playing live (selection styles, voices ... etc). When you finish a song and selet a new style and voice for another song, whatever the transpostion value is for the song you just played is retained .... until you manually go in and change the transpose value ... same for Registrations!

Thanks,