Can I change subtitle size on my computer? cynthiakyleung - September 13, 2015 09:12 Currently there’s no way to change subtitle size when viewing on your computer. We hope to be able to make this feature available in the future! However, you can change subtitle size on your mobile device. Click here to learn how for iOS and here to learn how for Android. Related articles How do I change subtitle size, font & color on iOS? Roku - Can I change the subtitles size and style? How do I change subtitle size on my Android app? Allowed HTML for Cover Pages and Profiles Roku - How do I resume watching where I left off?