Minecraft wiki entry for Moving_structures_using_structure_blocks_from_world_to_world, associated text: After the size is right, type in a structure name for your structure (capital letters don't work), in this case, we will use a structure called "battle_tank". After you finished renaming your structure, click the "SAVE" button at the bottom right (the bottom left "SAVE" button switches the mode) to save your structure. You do not need to copy a structure in the other world you're moving your structure to.