Posted by dellus on Aug 18, 2021; 11:10pm
URL: https://forum.librecad.org/Beginners-Problem-with-LibreCAD-grid-spacing-snap-does-not-seem-to-work-tp5720925p5720926.html

"Automatically scale grid" in Options - Application Preferences - Appearance only affects the visual appearance of the grid on screen, but not the actual snapping points. So that's irrelevant.
The actual snapping points (if activated by "Snap on grid") are defined by Options - Current Drawing preferences - Grid - X-Spacing and Y-Spacing, in your case both set to 0.001. You have done this right and it works for me. Don't know why it doesn't for you.
But generally it is no good idea to make a drawing based on snapping to grid points, especially if your units are meters and you want 1 mm steps, how many thousands of snap points will there be...
Better learn to work with absolute and relative xy coordinates, switch snap on grid off and let Grid - X-Spacing and Y-Spacing set at Auto.
What LibreCAD version do you use and what is the intended printing scale?