On your iPhone or iPad, you can adjust the size, color, and other visual elements of captions and subtitles by going into your device's settings and adjusting captions settings. To do so, please follow these steps:
1. Open your iOS device Settings app.
2. Go to General.
3. Tap Accessibility.
4. Under the "Media" section, tap Subtitles & Captioning.
5. Tap Style to change the size and style for the display and font.
6. Tap Create New Style for more font styles, sizes, and colors.
The settings you set up here should be reflected in the captions that display in Tubi.