Change background color

Hello.
How i can change background color from black to another color, when i open fullscreen mode?

Not sure I am following - your screenshot is mostly of the inspector, with a black background. Is that what you're referring to? Or are you referring to Canvas or a visualization in Kibana?

Hellow Tyler!
It's full screen workpad from canvas. And when i open this in display with big resolution i see a black frame around my canvas. How can i change the background color of this frame? Or another way how i can resolve this problem

@tylersmalley Hello! Can you help me?