In MatterControl you can add a 'Set Temperature' object and place it at the height you want the temperature to change.
You can find it in 'Design Apps'/'Calibration Parts'
It looks like this:
You can then move it to the height you want to change the temp and set the temp on the right
Thanks guys. That warms my heart, and makes the hard work worth doing.
So many exciting things on the horizon, performance improvements, new tools, improvements to existing tools, and a bunch of things I can't talk about yet.