Unity scroll unknown length, runtime adding items

I’m trying to make an automatic scroll in unity with an unknown length of items. I watched this video on youtube and the guy copies an item and pastes it three times and the new items automatically go to the end of the content list but when I do it, it pastes over the item I copied. How did he do that?

What I want: couple of knives next to one another

What I have: Image(8) is the copy of Image(7) and it is over 7 rather than next to it.

Hi @Mahsaistiresofchoosingusernames
Just add a Horizontal layout group to your Content and a Content fitter