I have an Ender 3v2 and I recently installed the CR Touch auto bed leveler. I was wondering how to add more probing points.
I haven't tried it, but it looks like the number of points in each axis of the probing grid is defined by these lines:
#define GRID_MAX_POINTS_X 3 // Don't use more than 7 points per axis, implementation limited. #define GRID_MAX_POINTS_Y GRID_MAX_POINTS_X
in Marlin's Configuration.h file. So assuming you'd want the same number of points in each direction, change the
3 to another value less than or equal to
7, and recompile Marlin.