Thanks! The second tipp on the website you pointed out did the trick:
In the attributes settings checkbox ‘Enable Archives?‘ should be checked!!
Sorry – the link wasn’t quite right.
Since I don’t know how to edit my last post – here the correct landing site http://werke.adelheid-kilian.de/werke
(“filter by color” not doing anything despite the fact that it says the right (test)amount of pictures when hovering over the colors)
Thanks for looking into this.
Uli
