A4 camber adjustment? inside tire wear

[Arthur Marks]

Rotated my tires the other day and noticed wear on the inside of the front 
tires. Am I correct in my understanding that this is due to camber 
alignment? And if I'm reading the Bentley manual correctly you can only 
center the camber evenly (my tire wear seems pretty even left and right) but 
you cannot change the angle of the wheels to get them to vertical?

--Art
1.8T Q A4 (B6)