Imashini zimashini zikoreshwa hamwe nimbuto cyangwa zinjizwa mu buryo butaziguye kugirango zuzuze ibice hamwe.Gupimirwa kuva munsi yumutwe kugeza hejuru yisonga kugirango ubone uburebure bwihuse.Koresha hamwe nutubuto tumwe turangije kandi ushyizwe kumurongo kugirango bikwiranye.