This function mainly adjusts the style of CC subtitles, which requires application support and video adaptation.
Setting method:
realme UI 4.0 & above versions: Settings > Additional Settings /Accessibility & convenience> Accessibility > Hearing > Caption preferences
realme UI 3.0: Settings > System settings > Accessibility > Hearing > Caption preferences
realme UI 2.0 & 1.0: Settings > Additional Settings > Accessibility > Caption preferences
realme UI R & Go & T & S & U Edition: Settings > Accessibility > Caption preferences