Cov phau ntawv yog khi rau ntau txoj kev sib txawv, nrog rau cov kua nplaum, staple, xov, kauv, rings lossis ib qho ua ke ntawm cov saum toj no. Txoj kev khi yuav txiav txim siab seb lub phau ntawv tiaj tus li cas, nws nyob ua ke zoo npaum li cas, thiab feem ntau nws ruaj khov npaum li cas. Ib tug menyuam kawm ntawv xav tau ib phau ntawv uas txhawb nqa txhua yam kev kawm thiab kev kawm hauv chav kawm. Nws tseem yuav tsum muaj peev xwm tiv taus raug pov nyob ib puag ncig hauv lub hnab ev ntawv.Nws yog cov khoom tsim nyog rau cov tub ntxhais kawm lossis tub ceev xwm.