Select the characters to use in the free typing games, free typing lessons, and free typing tests. European characters and Kanji are supported. The games and tests require a minimum of 8 unique characters. Lessons require 2 characters for the typing tutor, and any number of characters to include in the review. When the fields above are correct, click the Save Settings button to save. The custom lesson will be available in the games, lessons and tests if the fields above are filled in correctly. To remove the custom lesson, just clear out the fields above and click the save settings.