Anyone can tell me please how to remove the origin point for the grid?
Same to this post ([RESOLVED] Delete drilling and placement origin point) However I do not know how to delete it in the kicad.pcb file.
Should I open it with notepad to delete the set origin?
The grid origin point is light grey. Aux axis origin is red. You will get rid of the red one only by editing the file by hand. Or you can just set it outside your working area - it’s not used for anything unless you use it explicitly.