The Array tool creates a linear or radial array of selected elements. 
Use the Array tool to create several instances of one or more elements and manipulate them simultaneously. 
Array members can belong to a group; therefore, you can add or remove items from the group. For more information about grouping, see 
  About Editing Elements in Groups. 
Note: After using the Array tool, user-specified settings are remembered for subsequent uses of the tool. See, 
  
Save Modify Tool Settings.
 
Note: Arrays are not supported for most annotation symbols. 
Examples
 
   
  - You can select a door and a window residing on a wall and create multiple instances of the door-window configuration. 
	 
 
- You can create an array of 7 walls. When you group a desk with one of the walls, all walls in the array get a desk. 
	 
 
 
  
An array of windows and columns