I have a 40w diode laser in snapmaker and when i had the 10w it was all fine . but the 40 w has problems .eg with my job is say 100mm by100m . i cut a sheet of MDF 120 by 120. so little waste . put it in machine and run a boundry , adjust so boundry draws a line inside the piece of wood . then i burn . all this was fine and great when i had the 10w module . BUT since i upgraded to 40 W module the boundry draws a 395 x 395 boarder. so i do a start burn and the laser start no were near the wood placed.. or i got the laser to draw a boundry close but once i hit burn it is starting and burning a hell of long way away , so for a short fix . i place a sheet 395 x395 and it all cuts the 100 x100 work somewhere but works out .. ( a lot of wate thou . ) . I plan in lightburn and save Gcode as a .nc . same way i have done when i had 10w module …… I want the bounder to draw ??? the the laser to cut same place to aviod wasting material.
With Lightburn it is a bit tricky - first, look at this page:
https://wiki.snapmaker.com/en/general/manual/use_ray_with_lightburn_guide
There are profiles for the different lasers in Lightburn. And than it matters if you select Marlin or GRBL as flavour in Lightburn. I seem to remember that the profiles switch that, but if not, try GRBL, for 2D laser work it works better than the Marlin. My brain has holes, so I do not remember everything right now, but some of the stuff is in this thread:
Admittedly, not very structured and SM 2.0 focused, but I guess Artisan is very similar.
EDIT: and of course be aware of this one:
This one is more updated. 
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