Fixing the movie lists

I’d like to fix the movie lists, especially the wide list.

– make it 50:50 instead of 30:70?
– remove the spoiler text
– increase the poster size
– disable the distracting alphabet letter (top mid) while scrolling
– increase background transparency to see more fanart

I tried to dig through the xml files but I can’t grasp whre is what and how to change it. Are there docs on this somewhere?