No Problem:
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Library → Expression Maps
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Select NotePerformer in the left pane
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In the middle pane, click ‘+’ and find (or search) Sustain pedal, make sure it’s highlighted then click Ok
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In the right panel, click CC (left-most button), change the first value (middle column) to 64, last column to 127
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Click Off events, click CC, change first value to 64 and second value to 1
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Click OK


