Canon BJC-4200 - Manual (Page 47)

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You use the Tests option on the Control tab in your BJC-4200 printer driver to print
a self test, demonstration page, or a nozzle test pattern. You can use these test prints
to check the operation of your printer and your print quality.
Before selecting a Tests option, make sure paper is properly loaded in the sheet
feeder (see Automatically Feeding Paper starting on page 3-7).
Click on the Tests option and then click on the Print button.
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This test prints a repeating pattern of characters.
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This test prints a sample page describing the printer's features.