1. Look for the character icons: On the bottom of the screen, you'll see icons representing the playable characters you've unlocked so far in the game.
2. Select the character you want: Use the directional buttons on your controller or the keyboard to highlight the icon of the character you want to play as.
3. Press the corresponding button: Press the button associated with selecting that character (usually "A" or "X" on a controller, or the "Enter" key on a keyboard).
Important notes:
* Not all characters are available in all areas: Some characters might be locked until later in the game or are specific to certain areas.
* Specific abilities: Each character has unique abilities. Switching characters can be crucial to access certain areas or solve puzzles.
Remember, you'll need to unlock characters through the main story or by completing side quests before you can switch to them.