Epson Stylus Pro 3880 User Manual page 84

The guide is black for the black-and-white printing.
4. Join the upper left and right sheets together with cellophane tape on the back of the sheets.
5. Try step 1 to 4 for the lower sheets.
6. Cut the bottom of upper sheets along the alignment mark (horizontal blue line).
The guide is black for the black-and-white printing.
Epson Stylus Pro 3880 User's Guide
Variety of Printings 84