The page might be too short to use the horizontal scroll effect for the many images. Possibly distribute the 20 images over several lines.

Since the item costs 18 credits, I can't and don't want to do any tests.

What do you mean about the page is too short

Here in the demo you can see that the page has to be scrolled a lot in order to see many images and that if there are many images, the images should be spread over several lines.

>> https://market.websitex5.com/de/objekte/vorschau/7530c351-2e9c-4179-8704-26718e6329d

Errol, I do not have this optional object either I am sorry, and the preview does not show what controls are available to increase the number of images displayed (although I suspect it may be limited to the number of images that can be displayed across the page based on dimensions, so if you reduce image widths you may fit more).

Having said this, why not simply use the built in gallery object? Horizontal thumbnails per frame will give a similar view (without the images scrolling horizontally as you scroll down the page) and your choice of how many are displayed?

Horizontal Thumbnails will look much like your existing example but with navigation arrows.

Alternatively you could use many of the alternatives . . .

I saw that demo. I also looked at the guide about the Scroll Horizontal Object. There is nothing stating a min or max number of images. Perhaps the creator of the object could elaborate on its use.

To add extra space without content on the page, the Simple Separator object can be used.

>> https://market.websitex5.com/en/objects/962af960-3184-4db6-954c-24215440ca9

Just do it like in the demo and put e.g. 5 "Scroll Image Hor" objects on the page and divide the series of images into these 5 objects.