maybe im blind but i didnt saw any possibiltiy in the manual to play a pattern only as long a midi key is pressed.
there is a similar function for muting a channel but only mute not play pattern. i feel like the default behavior is best for live play, but when setting up an arrangement a pattern-play-while-midi-note is engaged seems more favorable as you dont have to include stops everywhere.

------------quote--------
C2 to G2 48 to 55 Mute channel one to eight. The channel will stay
muted for as long as the key is held down. Foot-
switch (MIDI controller 64) can be used to sustain
mutes.!
------------quote end ----------

Try the "Retrigger Gated" midi mode in Midi Config:

awesome, thanks !
.. now i also found it in the manual 🥴😅