You can move any layer on the current page to make all layers line up better.
To move a layer:
In the Layers window (Preference ® Layers):
1. Right mouse click the name of the layer to move.
2. From the menu that appears, choose Move.
On the layer:
3. Click part of the image to move.
4. Move the pointer to the new location for that part of the image, and click.
A line is drawn between the first and second clicks.
5. In the Verify Layer Move dialog box, click OK. (To select a different location for the layer, click Reset.)
The layer moves to the new position.