Shift-move creates a clone in a different location.
Cloning objects while moving them is quick and easy. It produces a linear array of two or more objects.
To clone with Shift-Move:
Click the Move button on the main toolbar.
Choose a coordinate system and axis constraint.
Make the selection you want to use Shift-Move with.
Hold down SHIFT and drag to move a clone of the selection away from the original.
Choose the number of copies you want to make on the Clone Options dialog, and whether you want them to be copies, instances, or references.
Multiple clones produced by Shift-Move form an equally spaced linear array with these characteristics:
The line of the array runs from the center of the original through the centers of the clones.
The spacing between copies is determined by the distance between the original and the first clone.
By using snaps as you move the selection, you can make exact arrays.
A clear example of the Shift-Move array is the picket fence. From a single picket, you can generate long runs of fencing. You can array the fence along a major axis of the home grid, then group the pickets, rotate them to a particular angle, and move them into position.
You can also make three-dimensional arrays with Shift-Move. The main choice is the combination of axes to allow movement off the construction plane. For example, to build a stairway, you can create a box that forms the top step, then use Shift-Move to copy it diagonally downward, using an array to create a downward flight.