@kikero: Hello there,
Edit the page where you want to add the Catch Gallery.
Now Add a new block => Formatting => Classic => Click on Add Media button => Create Gallery => Select the images you want in the gallery => Click on Create a new gallery => On the right side you will Gallery Settings select your option and Click on Insert Gallery.
Let me know if you are still having problem setting up catch gallery.
Kind Regards,
Skandha
