1. Open your phone and search for "Mobile Altman Cosmic Hero" in the app store.
2. After finding the corresponding game, click Install.
3. After the installation is completed, open the game.
4. In the game, find the settings or options menu, usually these options will be located in the main interface or pause menu of the game.
5. In the settings or options menu, look for "built-in menu" or similar options.
6. Click "Built-in Menu" to download or enable.