Keep Vietnamese captions readable on a small screen.
Work in a portrait layout
Preview your clip in 9:16 before posting and check that the crop keeps your subject visible next to the captions.
Respect the safe zones
Place captions above app buttons, usernames and the sound tag so nothing on screen competes with the text.
Give marks room to breathe
Use short lines and enough line spacing for stacked diacritics, then confirm each highlighted word lines up with the speech.







