jogru

Thank you! Just wanted to tell you that it worked. (Sorry for the delay.)

At the beginning I had to turn this option off, because images were not centered correctly at this resolution:
“Disable reordering for devices > 768px (portrait width of tablets)
Check this box if you want to display 4 FP by lines on tablet’s portrait layout”

This now seems to work now, too. (Although I do not use it at the moment.)