Hi,
pattern change via midi (PC) is basic operation on almost every Elektron-box. Make sure that pc-receive is enabled in setup menu.
But: I assume you will not have so much success with the DT for the moment…
Well, it needs some time to know where to look at the manuals and how to perform a query in this forum.
Here a tiny reminder from my A4 (works on AR, MD, MM and OT):
AR ProgChange Pattern.pdf (47.7 KB)