Via the Bank buttons where you have assigned your Combination to a specific Bank button.
Via a footswitch and MIDI command.
As usual the Korg manual is not exactly crystal clear on on the how to subject.
I cannot be any more specific as I had a Kross 2 and not an X50.
You may also find that the X50 has note(s) cut off when you change to another Program or Combi so timing to initiate the change is the key (bad pun intended).
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