Canon G1000 series Online Manual page 206

After refilling the ink tank, perform system cleaning.
• For Windows:
Cleaning the Print Heads
• For Mac OS:
Cleaning the Print Heads
When using paper with one printable surface, make sure paper is loaded with
Check4
printable side facing up.
Printing on the wrong side of such paper may cause unclear prints or prints with reduced quality.
Load paper with the printable side facing up.
Refer to the instruction manual supplied with the paper for detailed information on the printable side.
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