Dongosolo la ng'oma mu chosindikizira ndi gawo lofunikira lomwe limagwiritsidwa ntchito kusamutsa zithunzi ndi zolemba pamapepala. Zimakhala ndi ng'oma yozungulira ndi chinthu chojambula chomwe chimapanga mtengo wamagetsi pa chosindikizira ndikusamutsira chithunzicho ku pepala.