thank you @mitu!

@aphyx have you had a chance to read through the instructions I wrote up here? https://github.com/anthonycaccese/art-book-next-es?tab=readme-ov-file#theme-customizations

a few initial things to check...

as mitu called out try to make sure the "theme" value is what you are using to name your files. For example if you are looking to create a custom image for the super nintendo, the theme value is "snes" so you would name your file snes.ext (where ext is the actualy extension for the image type you are creating) on batocera make sure the "distribution" setting in theme configuration is set to "batocera" make sure your files are stored in the location where I set it to look for custom images on batocera... the root folder is userdata/theme-customizations/art-book-next/ then make sure inside that folder that your images are stored in the expected sub folder... if you are creating custom backgrounds they will go in a subfolder called backgrounds. If you are creating custom logos they will go in a subfolder called logos

Please let me know if you have any questions on the readme linked earlier. Also, if you can outline what you have tried already that will be a big help.

Thank you for your kind words and hope I can help.

@spaceblaze Just to confirm the above code change does work.

I reexported all the videos at 480p and now have control over the size.

As it turns out, the end result is not that great a user experience so I'm reworking the layout a bit.

Will post a video once I'm happy with it.

@Simrose In my personal experience, using and configuring multiple controllers in retropie involves going into the system file and changing the cfg file every time you want to change the controller (if you have custom mapping keys as I always use like volume). Also installing new systems, you have to enter to the repo and download different packages or drivers. With Batocera you place the bios files, roms and you are running, also you have a built in file browser inside the system, even if you want to configure any emulator setting you can do it right from the main menu without using a keyboard or entering any game. This is great to apply global settings like resolution, shaders or bezels.
For me its better and has much more options but Retropie has a better forum and support for solutions. This is my experience after years of using both.