Sorry, life got in the way so I was not able to test and report back right away.
So, 10mm grid worked (normally use inches) so I went to inches and it failed but I kind of figured it out. Lightburn seems to not like small numbers. I wanted a grid of .125" (1/8") and first it won’t stay set at .125, it switches to .130 but at this size the grid does not work as it should.
So I figure the fix is to switch to metric but it also failed to snap properly. Did go back to inches and then later went back to mm and now it’s working. Sometimes though the numbers I put in change after closing the prefs window.
So, why does inches in small numbers not work? and why does it change the numbers? 1/8" is a pretty standard number to use in CAD but I cannot get it to stay at .125" and it switches to .130" and that grid does not work properly.
I make some very small things and accuracy is important to me and grids are the only way to assure exact accuracy. I do use other programs as well but I like some of the drawing features in Lightburn and am trying to use it exclusively.