When selected, every object has handles that surround it. The handles also serve another purpose—they make an invisible rectangular boundary around objects. This boundary is used when aligning objects. When objects are aligned, they are lined up using a common boundary or page edge. For instance, if two objects are aligned on the left, the objects are aligned using each invisible left boundary.
Select two or more objects (Figure 9.21).
Figure 9.21. Select two or more objects that you want to align.
Choose Arrange > Align and Distribute or click the Align and Distribute button at the right end of the property ...