Newbie Help operating plasma cutter

Hi everyone,

I'm new with plasma cutter and would like some help, please. i'm operating a miller plasma cutter with a plasmaCAM table and controller.
i would like to know more about the different setting when cutting different types of metals. i've been having a hard time trying to cut 0.7mm thick copper properly.
Also i was wondering if it is possible to change to size of the flame?

Thanks