Select the shape to which you want to align other shapes, and then press SHIFT and click the shapes you want to align to it.
The primary shape has a thick magenta outline.
On the Shape menu, click AlignShapes.
Click the alignment options you want.
You can select both a Vertical alignment and a Horizontal alignment. To cancel a selection, click the red X.
To create a guide and glue the shapes to it, select the Create guide and glue shapes to it check box.
If you choose this option, you can move all the shapes and maintain their alignment by selecting and moving the guide.