This article shows you how to move and rotate a furniture object in the editor
To change the location or rotation of a furniture object, select the furniture object you'd like to move or rotate by clicking on it. Once selected, two small circles will appear, one in the center and one a bit further out:
Click and drag the circle in the center to move the furniture object around. Click and drag the outer circle to rotate it.
And that's it! Make sure to save your building model once you're happy with the changes.