ASUS phones mounted with operation system in Andorid 5.0 supports changing the fonts in all content displayed. Please note that some specific fonts need users to download for use.
ASUS phones mounted with operation system in Andorid 4.4 only supports changing the fonts on name of apps on desktop.
** This FAQ might not be applied to all series of phone products. Some options, screenshot, or operation process would be different owing to different firmware editions.