[Suicide Junkie]

Um.... What was the problem?

FYI, the copy and paste applies to the slot data, rather than the slots themselves.

New slots are given the properties of the copy buffer by default.

And right click means "move the selected slot here"

Do do things fast and efficiently, create a slot with all the properties you want, off to the side. Hit copy.
Now, right click where you want it, then repeat CTRL-N and right click to quickly lay down some tiling.