Los ntawm kev ua haujlwm interface (kev ua haujlwm hom) ntawm qhov program tswj cov ntawv txiav, nws tau muab faib uahom tseem ceeb, kov npo hom, hom tseem ceeb thiab kov npo hom.
Qhov tseem ceeb dual-hom thiab lub vijtsam kov tuaj yeem siv ua ke, uas tuaj yeem ua tau raws li tus cwj pwm qub ntawm qee tus neeg ua haujlwm. Nyob rau tib lub sijhawm, nws muab ib qho kev tawm tswv yim ntxiv, uas yog qhov txhim kho zoo dua qub.