Categories for codes on Fee slip

Can you add a lower extremity category for common dx codes? It seems very odd there isn’t that option. I can’t use the favorites category if there no way to organize the codes by region. But I can use common so please have someone add a lower extremity category as that is missing. Or move the “low back/pelvis/lower extremity” tab from “other codes” up to “common codes” and Change the name just to “lower extremity”.