Amazina yose yicyuma gifatanye nicyuma cyimodoka - "inkoni ya gare," "lever lever", "gearshift," cyangwa "shift" - bitandukanye niyi nteruro. Izina ryayo ryemewe ni uburyo bwo kohereza. Muri garebox yikora, icyuma kigereranywa kizwi nka "uwatoranije ibikoresho," mugihe icyerekezo cyo guhinduranya intoki kizwi nka "inkoni y'ibikoresho."
Ahantu henshi kubikoresho byuma ni hagati yintebe yimbere yimodoka, haba kuri kanseri yo hagati, umuyoboro wogukwirakwiza, cyangwa hasi hasi. Bitewe nihame rya shift-by-wire, lever mumodoka yohereza mu buryo bwikora ikora cyane nkuwatoranije ibikoresho kandi, mumamodoka mashya, ntabwo akeneye kugira ihuza ryimuka. Ifite kandi inyungu zo kwemerera ubugari bwuzuye intebe-yuburyo bwimbere. Nyuma yaje kuva mu kwamamara, ariko irashobora kuboneka ku makamyo menshi atwara abantu, amamodoka, n’imodoka zihutirwa ku isoko ry’Amerika y'Amajyaruguru.
Mu modoka zimwe na zimwe za siporo zigezweho, icyuma cyuma cyasimbujwe rwose na "paddles", kikaba ari impuzu zashyizwe ku mpande zombi z’inkingi, ubusanzwe zikoresha amashanyarazi (aho guhuza imashini na garebox), hamwe nimwe kongera ibikoresho hejuru nibindi hasi. Mbere yimyitozo yubu yo gushyiraho "paddles" kuri ruline (yakuweho) ubwayo, imodoka ya Formula ya mbere yakundaga guhisha inkoni yimbere inyuma yimodoka imbere yumubiri wizuru.