My laser is the Xtool p2 and I read somewhere to enter GOZ27 in the start Gcode section, I don’t know what it does
$L
G90
;M116A2B4
GOZ27
Can we change a z25 which is the top of my Knife or work surface to a 0 and work up? like if the workpiece is 3mm and you want the laser 2mm above the surface you could enter 5mm instead of subtracting from the 25 to 20mm as I do now for the Z where it says material thickness in the cuts and layers box