Changing your Bitmoji effect is relatively easy. First, open the Bitmoji app and tap on the menu icon located in the top-left corner of the screen. Next, select Settings from the list of options that appear. From there, you'll be taken to a page where you can customize all aspects of your avatar's appearance, including its facial expressions and animations (known as effects). Choose one of these effects by tapping on it and then hit Done to apply it to your Bitmoji. You can also use this page to create custom animations using pre-made assets or importing images from your photo library if desired. Once finished, save your changes and they will be reflected in all places where you use Bitmojis!