Enter text on Apple TV

When a keyboard appears onscreen on Apple TV, use your remote to do any of the following:

Enter a character: Navigate in the onscreen keyboard to a character, then select it.
Change keyboards: Press one or more times to switch between lowercase, uppercase, and special symbol keyboards (or select the uppercase, lowercase, or special symbol icon).
Change the keyboard language: Select until the keyboard language you want appears.
This option appears only if you’ve added additional languages in Settings.
Enter an alternate character (such as a letter with an accent mark): Navigate to the character, press and hold the clickpad center or touch surface to view character options, then select an alternate character.

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Apple TV User Guide