Epson EcoTank Pro ET-5150 Wireless All-in-One Supertank Printer - Manual (Page 285)

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You see a screen like this:
5. Select Print Head Alignment .
6. Select one of the following options:
• Vertical Alignment if your printout is blurry or contains vertical ruled lines that are misaligned.
• Horizontal Alignment if your printout contains horizontal banding.
7. Follow the on-screen instructions to print an alignment sheet.
Note: Do not cancel printing while you are printing head alignment patterns.
8. Check the printed patterns on the alignment sheet and select the following on the LCD screen,
depending on the alignment pattern you printed:
• Vertical Alignment : For each set of patterns, select the number representing the pattern with the
least amount of separation or overlap.