BROCHURE001 is a horizontal 3 Panel Tri Fold Letter Brochure measuring 13in x 8.5in that folds to 4.5in x 8.5in. In this render the PSD Mockup Flyer / Brochure is standing along the longest horizontal edge creating the illusion that there are 3 standing portrait panels.

TIP: After the final render, be sure to flatten all layers prior to scaling your result to avoid cracks from appearing along the seams (applies to any Action).