Okay, so if you put the project thumbnail as a project thumbnail element into the Gridder, at the moment, you can right-click it and then just choose a different image.
[image: 1784566630409-a6e9004d-3b34-4aa0-9771-e37a219ac8b1-grafik.png]
Maybe that helps. If you need to be able to set different videos, different images, and so on for each project for the mobile version, that's a feature I can add to Lay Theme for you for my hourly rate (90€ per hour), for example.