Ko te gThumb he kaitirotiro whakaahua koreutu me te tuwhera-puna me te kaiwhakarite whakaahua me nga whiringa hei whakatika whakaahua. Kua hoahoatia kia whai atanga kaiwhakamahi maamaa me te ngawari me te whai i te GNOME HIG, he pai te whakauru ki te taiao papamahi GNOME.