[PreHeat and LastVolt]

I would like to thank everyone for the important tips that were given to me! 

[PreHeat and LastVolt]

Hello I am a happy owner of dna250.
I wanted to ask some things:

How do I set the preheat in power mode?

In Escribe customizing there are all the "Display variables" but the "last volt" there isn't. How can put it? There is a topic where I can make suggestions for future product versions or firmware?

I can set the "board temperature" and "room temperature" in celsius degrees?

sorry for my bad english and thanks in advance.