How to change the appearance of subtitles and closed captions

You can change the font, size, shadow, and background color of subtitles and closed captions.

From a web browser

Go to your Netflix Account page.
From the Profile & Parental Controls section, select a profile.
Select Change for Subtitle appearance.

Note:

The subtitle appearance option isn't available in some countries with the following primary languages, even if a profile is set to a different language: Arabic and Hebrew. Selected appearance options also might not show on some older devices.
Choose your subtitle appearance settings.
Select Save.
Open the Netflix app on your device to start watching with your new subtitle appearance.

Note:

If you're using a TV, open the Netflix app on your TV and select Settings, then Get Help, then Reload for the changes to take effect.

Begin playing a TV show or movie.
From the player controls at the bottom of the screen, select Settings to adjust subtitle Size and Style.
Choose your Size and Style preferences.
Resume playing the title.

Note:

Connected TV devices don't offer all of the subtitle appearance options available from a web browser.

From the lower right, tap My Netflix.
From the upper right, tap More.
Tap Manage Profiles .
Select the profile you want to edit.
Tap Subtitle Appearance .
Choose your subtitle appearance settings. The new settings will automatically save.
To reset, tap Restore Default Settings.

Note:

Changes made using the Netflix app will only apply to titles played on your Android mobile device.

Go to Apple Support or visit the below articles for instructions:

Looking to turn on or off, or change your subtitle, caption, or audio language? Learn how to use subtitles, captions, or choosing your audio language.