Epson SureColor P8570DL 44" Wide-Format Dual Roll Printer with High-Capacity 1.6L Ink Pack System - Manual (Page 110)

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Note: Make sure the paper passes under the internal rollers as shown.
When using cut sheets with a paper length shorter than 11.69 inches (297 mm) : Insert the
paper past the alignment mark, making sure that it passes under the internal rollers.