Epson SureColor T3000 User Manual page 125

Joining Poster Sheets with Printed Borders
If Overlapping Alignment Marks is selected, join guides (indicated by the lines drawn
through and around the X marks in the illustration below) will be printed on each sheet.
Note:
If the output is in color, the join guides will be in blue and the cut guides in red; otherwise, all the
guides will be printed in black.
The following describes how to join four printed pages together.
More Ways to Print 125