Accordion fold (4 panels) – this folding selection varieties a zigzag pattern and it has 4 alternating panels on both sides. Double parallel fold – this fold option will make 4 panels by folding the paper in 50 % then in 50 % once more, parallel to the primary fold. https://flyer-printing41505.alltdesign.com/the-basic-principles-of-flyer-printing-58780495