You can align objects with one another using the Align panel (Window menu > Align) in the following ways.
How to align an object with selected objects
- Choose Selection in the Align panel.
The selected objects are aligned relative to each other.
How to align an object with the document
- Click Document in the Align panel.
The selected objects are aligned relative to the document.
Example:
You want to put an object in the upper left corner of your document.
1. Select the object.
2. Select Document in the Align panel.
3. Click the and buttons to align your document.