Proceed to 'My App,' navigate to 'Structure,' then access the 'Home' section and select 'Edit.'
Scroll down, hover over the existing image, and then click the 'Trash Can' icon to remove it. Afterward, a 'Browse' button will appear for you to upload a new image.
After making the desired changes, click on the 'Update' button to apply the modifications to your application.
Please note that images for the homepage must be in 'JPEG' format and possess dimensions of '3200x3200' pixels. To ensure optimal display on mobile devices, it is advisable to center the image.