How to Place and Use Prefab Structures
Placing a Structure
Hold the structure item and use it on the ground where you want the build to appear. Structures such as House, Farm, Warehouse, Modern, Saloon, Ski Lodge, Town Hall, Watch Tower, Welcome Center, Jail, Defense Bunker, Machinery Tower, Magic Temple, Mineshaft Entrance, Aqua Base, Improved Aqua Base, Improved Farm, Improved House, Improved Modern, Improved Warehouse, Advanced Farm, Advanced House, Advanced Modern, Modular House, Villager Houses, Grassy Plain, and Instant Bridge all place as complete builds. Clear the area first — trees, water and existing blocks can block placement.
Adjusting and Upgrading
Use the Upgrade item on a placed structure to move it to its improved form, for example Farm to Improved Farm, House to Improved House, Modern to Improved Modern, Warehouse to Improved Warehouse, and Aqua Base to Improved Aqua Base. Use the Structure Scanner on a placed build to inspect it. Use the Bulldozer to clear blocks in the way; the Creative Bulldozer clears without consuming durability. The Boundary Block marks edges of an area you want to keep clear. The Light Switch toggles the lamps inside a build, and Dark Lamp, Paper Lantern, Coil of Lanterns and String of Lanterns provide the lighting fixtures.
Doors and Travel
Place the Ender Gateway and Nether Gate to create linked travel points. The Drafter and Compressed Chest store and sort what you gather while building.