https://forum.strawberrymusicplayer.org/topic/5817/custom-background-image-transparency/2
Custom background image transparency | Strawberry Music Player Forum
Jun 27, 2025 - @ida Transparency isn't supported for custom background images.
custom background imagestrawberry music playertransparencyforum
https://docs.getontime.no/quick-tips/custom-background/
Custom background image | Ontime documentation
Adding a custom background image to an Ontime view
custom background imageontimedocumentation