These three tools help you arrange the objects in your drawings into neat, regular patterns. First, select the objects you want to arrange. Do this by clicking on each object in turn while holding down the Shift key.
The last object you click (with the black selection handles) is called the Target Object. When you use Align or Make Same Size under the Arrange menu, all the selected objects will be aligned or sized to match the Target Object.
When you choose Space Evenly, the objects at each end of a series stay fixed, and the others are spaced evenly between them.
The results after using: Align, Make Same Size, and Space Evenly