Scrolling Text and alphanumeric kbd
When you hold the shift button down for a period of time (maybe 3 seconds) the top 3 rows of the note entry pad could become an alphanumeric keypad and the bottom 5 could scroll text (conditionally based)
i.e. sample name, track name, preset name, song name, etc.
It's easier to find a song or track by name rather than by it's number (001A-Z through 999a-z)
So- the LED readout could display the number and the note entry pad could display the name.