1. In the event dashboard, click on the "Event App" button.

2. Click on "App Layout" from the sidebar.

3. Click on the dot menu icon of the page you want to change the icon.

4. Click on the Settings.

5. Click on the Icon Field.

6. Select a new icon from the list of icons.

7. Once Selected, click on the "Save" button

8. Once the action is performed, the new icon is now added to the feature page and is visible in the app.