Loading indicators can be installed from the marketplace. Using loading indicators, the app user knows that something is going on (e.g: user is logging in, order is being sent).
1. Login in your admin to customize your app
2. Navigate to "Design / UI > Loading indicators". If you can't see that page, you first need to install a loading indicator.
3. Customize the loading indicator and click on "Activate"
4. If you want to restore the system loading indicator, click on top on "Restore"