How to use the Bambu Studio

The Bambu Studio always back to 3mm when i modify the parameter of axis Z.
Device:Bambu lab X1 Carbon
The Support Surface was opened, but when I printed there were not any support materials on the Hot Plate.
The nozzle was blocking and suspend on Hot Plate when I printing.
So I want to raise my module height with Bambu Studio to solve the problem. I think if the height increased the support materials will be added on hot plate.

I need help!have anyone willing help me?

Hi there and welcome,

I don’t get the full grasp of what you want to achieve. But regarding moving objects upwards, this is not easily possible. Single objects (even if there are multiples) are always attached to the printing plate. You can add modifiers to the object and then freely move the desired object individually around the printing space.

Does your model look the same from below? Why would you need support structure? And why did you had a clogged nozzle during printing?