Canon Pixma MG6821 Online Manual page 878

See also the sections below:
Cannot Complete Printing
Part of Page Is Not Printed (Windows)
Paper Is Blank/Printing Is Blurry/Colors Are Wrong/White Streaks Appear
Lines Are Misaligned
Lines Incomplete or Missing (Windows)
Images Incomplete or Missing (Windows)
Ink Blots / Paper Curl
Paper Is Smudged / Printed Surface Is Scratched
Back of Paper Is Smudged
Vertical Line Next to Image
Uneven or Streaked Colors
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