First post. I have just moved from repetier host to pronterface and am very happy with it. My background is software engineer and am used to using real time debuggers for embedded processors and controllers. Pronterface has a decent gcode editor. It would be nice if one could insert breakpoints and single step (isingle gcode command) the gcode. As I said I am new to pronterface and have notby dusty - Printrun/Pronterface