Selected landscape componet tile to new landscape?

I have a landscape piece that I wanted to separate. Since I don’t see any tools that would allow such a thing to be done, I wanted to use the selection tool and only select specific section tiles of a much larger landscape and copy paste this selection onto a smaller landscape.

This seems to work some that when I copy paste it over, I get a sort of follow projection of what it looks like on the new landscape, but I have no idea how I confirm this.

Would love if someone one knew how to the landscape tools works well and how I can follow through and do this copy pasting.