How to add words to the input method that comes with Apple notebook?

1. First, open the Apple notebook, open the text editing App supporting Unicode, and create a rule file, which must be a plain text file.

2. Secondly, use Unicode(UTF 16) to encode the stored file, customize the file extension, and double-click the stored file.

3. Finally, the custom input method will be added to the input method menu in the menu bar and the input method list in the keyboard settings. To view it, select Apple Menu, System Settings, and then click the keyboard in the sidebar. (Scroll down) Go to the text entry on the right and click Edit to customize the speech.