I’d like to enlarge my logo so that it overlaps the slider – without disrupting the slider show. How might I do this? Or, if I could create a background image for the header that would be suffice. If so, what would be the pixel size to fit the header perfectly?
You would need to have a freelance developer assist with that level of customization. The header structure would need to be heavily re-done or lots of css tweaks and making the logo class selector position:absolute and then forcing the header to a proper height.
For just the background image, you can do something like: