Originally Posted by korkii
I'm sure I've touched all options, but I did not have the options I wanted. The default margins are black, but this color is unconditionally fixed and can not be changed. Please add this option.
Unfortunately, we could get your request well. Could you please confirm whether you are looking for the customization of colour of the title bar and other UI frames or the black background used when the video doesn't fit with the screen? It will be more helpful if you can provide us with some screenshots.