How can I customize my Dawn Theme 7.01 banner background?

I want to have a customized design on my banner rather than inputting just a logo. I imagine that there would be a way to do so in the source code, however I’d like some help on how to do this as I have no idea where to start. Thanks in advance.

@TRSTORE - what banner background design do you want?

I just want to use an image that I’ve uploaded to Shopify