@mattrixk many thanks! All images, icons and logos of consoles, images of buttons, etc., I drew myself. The only thing I borrowed is the icons for the RetroPie settings. I don’t even remember who their author is, but it was someone from the same forum. They are in the catalog: retropie/icons

Okey I found the solution: https://steamcommunity.com/discussions/forum/11/558756256090837817/ By holding the menu button I could disable the scaling mode, why samsung couldn't build a menu function for that....