You can change the height at which single-click elements are inserted by editing their behavior properties. The Distance above current location or terrain option lets you control the height at which the element is inserted relative to the floor or terrain. The value entered is the distance from the floor or terrain to the insertion point of the element. (For most elements except windows and wall openings, the insertion point is at the bottom of the element.)
To edit an element’s insertion height:
Access the element's properties.
Select the Behavior tab.
Edit the value in the Distance above current location or terrain edit box.
Click OK.