By default, reference grid annotations are generated when a REFGRID is added to the drawlist. Refer to Reference Grid Annotations for further information. To remove the functionality,
you can modify the view visual style to prevent the system from automatically generating the annotations and use grids tasks instead. There are two example PML functions supplied, apsgrids.pmlfnc and apsgriddimn.pmlfnc that can used to generate grid labels and dimensions.