Creating an Array of Objects
To create a rectangular array
- From the Modify menu, choose Array. Then enter r (Rectangular).
- Select the objects to be arrayed and press ENTER.
- Enter the number of horizontal rows of objects to be created.
- Enter the number of vertical columns of objects to be created.
- Do one of the following:
- Enter the distance between rows, and then enter the distance between columns. Adding a plus sign (+) or a minus sign (-) determines direction.
- Specify the diagonal corners of a unit cell rectangle, which determines both the vertical and horizontal spacing of the rows and columns.
Modify toolbar: 
Command line equivalent: ARRAY