Can someone tell me exactly what this is? What is it that is aligned? And does one need vertical alignment and bi-directional alignment.
And when I print an alignment check with My Canon S630 I get 6 columns (A through F). A, D and F are black (or precisely grayish), B and E are blue and C is pink. Why isn't there a yellow color? Then I get instructed to set the numbers for A through F according to the printed pattern #s that is the smoothest, i.e has the least pronounced vertical lines. What is happening here?
Is there a site that explains this...really explains it well?