Coordinate grid

To overlay the coordinate gird on the image,
IDL> stepper, data(*,*,0), norh_get_info(index(0)) $<$CR$>$
IDL> norh_grid, index(0) $<$CR$>$
To get the heliographic coordinate of the pointer
IDL> norh_grid, index(0), /read_out $<$CR$>$