So, I'm building a maze for an adventure and did not build it with a roof because I wanted to add some props to make it interesting (and serve as landmarks) - I couldn't do it when I tried it at first with the roof on - So, now I'm ready to add the roof and for the life of me can't get one up on top - they all want to stay on the floor - I've even tried borrowing roofs from other player's adventures (which they got to work because the roof was a separate item and their adventures are up and running)..... How on earth is this done? I've been trying different things for two days and am about at my wits end (took me an entire week to build the maze - I'm kinda slow at this) - any help is greatly appreciated. many thanks!

Place the roof on the ground, hold control, slide the mouse forward, the building will move up into the air. Then, you just have to maneuver it into position and fine tune the height.

Awesome!!! thank you, thank you, thank you, thank you!!!!!!!!!!!!!!!!! It has been driving me crazy!!

also hold shift to keep it level