1. Open the Amazon Prime Video app on your device.
2. Select the movie or TV show you want to watch.
3. Once the video starts playing, tap on the screen.
4. Tap on the Subtitles icon.
5. Select the subtitle language you want to use.
Subtitles will now appear on the screen while you watch the video.
*Note:* Not all Amazon Prime Video content is available with subtitles. If you don't see the Subtitles icon, it means that subtitles are not available for that particular video.