(SPMC/KODI) How can I make the background fill the screen more?

I’m using Titan Netflix v2 Marcel beta for my fire stick on SPMC and also on my PC with Kodi 17

I’m trying to get the global background image to fill in more than just the corner of the screen – here’s a picture of what it currently looks like: http://imgur.com/a/ZUoPc

I just want it a bit more out there, not so much stuck in a tint boxed corner. Any help?!