Modifying combination presets in M1

There is a Combo Preset called FraggleRock which is by default split at middle C with two sounds occupying the section above middle C and two below. I want to mute the parts below middle C (done) and extend the range of the parts assigned above middle C to the whole keyboard. I cannot find any way to modify the key range for the parts in M1. Any ideas?

Nevermind. Just found it.

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