You can align objects in relation to each other. For example, align their top edges.
To align vector objects:
On the Tools toolbar, choose
the Object Selection tool
.
Select the first vector object. All other objects selected will align to this object.
Press the Shift key and select each additional object you want to align.
On the Tool Options palette, click one of the Object Alignment buttons:
Top 
,
Bottom 
, Left
, Right 
,
Vertical Center 
, or Horizontal Center 
.
Note: You can also choose Objects > Align and select a command.
Grouping and Ungrouping Vector Objects
Positioning Vector Objects on the Canvas
Arranging Vector Object on the Canvas