I was in Dashboard
I went to Appearence
then Themes
Then customiz
then I chose
Edit Header, Footer, pages
Then I choose Header
then it opens up page layer
Then I choose the section where the navigation bar is at, click on thre pencil icon
Say edit primary menu
Most options say Pro in red letters
I clicked on settings and I changed the color of the so at least the navigation bar is visible.
If I pick the blank space next to the navigation bar
then I choose background type options are None / Video / Parallax / Slider
but nothing for single image.
Am I in the correct area???
at least I was able to change the nav bar background color to make it visible.