Epson SureColor T3170M 24" Wireless Printer, Scanner & Copier - Manual (Page 245)

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Increase the value to correct alignment like this:
Decrease the value to correct alignment like this:
4. Select OK to finish entering the value.
Parent topic: Scanned Image is Misaligned
Lines Appear on Scanned or Copied Documents
If lines appear on copy results or scanned images, clean the inside of the scanner.
Parent topic: Solving Scanning Problems
Related tasks
Cleaning the Integrated Scanner
Scanned Image Size Does Not Match Print Size
If your roll paper printouts need to match the length of your scanned or copied files exactly, you can
adjust the document feed.
1. Press the home button, if necessary.
2. Select Settings > General Settings > Scan Settings > Scan Options > Document Feed
Adjustment .