Marquee

The Marquee tool is primarily used to highlight selections of player-placed blocks in the world to relocate or make a copy of them in a new location. The Marquee can also be used as a substitue for the Demolisher and delete your selection.

By default, you can hold shift to activate the Marquee tool and make your selection. Once you have made your selection you can click and drag one of the blocks to move the whole structure to a new spot. When you let go, the old blocks will be deleted and new ones will instantly appear at the new spot. If you instead hold 'C' on your keyboard while clicking and dragging, it will leave the old structure there and create an identical copy at the new location. Alternatively, you can press 'Backspace' to delete the structure you have slected.

The only player-placed block that cannot be selected are Pipes.