Drop modulation technology means that the printer can print with drops of variable size. This is a major improvement in quality and one more feature our current native RISC OS drivers cannot make use of. "Soft weaving" basically means high-quality printing without stripes - again, our native drivers cannot do that (except possibly the now rather outdated SpaceTech drivers). Fortunately, you do not need to understand all the concepts involved. Just print and let Gimp-Print do everything for you. For experts, there is a lot of stuff to set up and control, e.g., colour balance, but you do not need that to get good printouts.