Setting background image

[franz159]

I upgraded from version 6.1 to 6.7.1 and I cannot find how to set a background image.
Has the feature been removed?
Thanks

.... A P P E A R A N C E   S E T T I N G S / Themes and backgrounds

Thanks! My mistake, if you set ALpha Blend to 1, the "Image Backdrop" button disappears.
What I was trying to do was to set a black background image because the web interface appears all white in my wife "iPhone 5c" or "iPad 3"... and last time I installed Moode 6.1 this sorted the issue.
However, this time, after moving to version 6.7.2, the issue persists even after installing the black background.
So, my question now is: is there a URL to load directly the Web Radio page, which is all my wife needs?
Thanks