In a layout drawing, you can swap the artworks on layout 1ups that have identical structures.
IMPORTANT: Note that the functionality swaps the two artworks, not the layout 1ups. That is why it is necessary that the layout 1ups are of the same structure. The action would otherwise be meaningless as the two artworks would not fit on differently sized structures.
The program encloses the selected layout 1up in a violet rectangle.
After you click, the program swaps the two artworks.
The end result should look like the following: