Printer assembly finished - Now, what software?

Folks - 3d printer novice here. I just finished my 2020. It went together OK, some things I thought were silly, like why does the hot plate have to go on so early? And if the distance between the X-axis parts is supposed to be 300mm and this is a critical distance, why don't the bores in the end pieces set that? Mine had little resistance, so the distance is pretty much set by the belt tension. Why is there no screw adjustment for the Z-axis limit switch?

But I digress...

Reading over the pages of this thread has confused me as to what firmware/software I should be loading the arduino up with. I have the graphic display. Can someone point me to the best version as it stands right now?

Thanks!

Mark

Use Marlin but in the configuration.h (check please?) You need to select which screen you have by uncommenting the correct section.
if you have the sd card, don't forget to set that as well.

You may run into problems running a full graphic display on a arduino mega, the arduino is fitted with a 5v 500 mA regulator which is not enough for most graphic displays.