[andrella]

Many thanks for your fast reply.
I noticed that I do not have the option Appearance->Background in my WordPress. I’m using WordPress 3.6 and only got following option available in the ‘Appearance’
– Customize
– Widgets
– Menüs
– Theme Options
– Install Plugins
– Header
– Editor

Do I need to unlock the background-option somehwere? I’m using Clean Retina Pro in the latest version.