Canon BJC-5100 - Manual (Page 61)

Chapter 4 Maintaining the Printer 4-5
Maintaining the Printer
Aligning the Print Heads
When you click on the Start Auto Head Alignment box, you see this
screen:
N
Make sure you have letter-size plain paper loaded. The printer outputs a
one-page pattern.
When you click the Align Print Heads button, the printer automatically
aligns the print heads. This takes approximately five minutes. As it aligns
the print heads, the printer outputs a one-page pattern.
No further action is required. You can now start your print operations.