Using this macro, I can change the jog to whatever I want, notice I am changing the Jog% for each motor. It won't update the display if you try and change it below 50%. Not sure why, this is a question for someone who knows more than me.
--Set Jog Rate
function m324()
local inst = mc.mcGetInstance()
local JogRate = 72.3 --Jog %
mc.mcJogSetRate(inst, 0, JogRate) --Motor 0
mc.mcJogSetRate(inst, 1, JogRate) --Motor 1
mc.mcJogSetRate(inst, 2, JogRate) --Motor 2
mc.mcJogSetRate(inst, 3, JogRate) --Motor 3
end --m324
if (mc.mcInEditor() == 1) then
m324()
end