Brochure Layout

8 1/2" x 11", three panel. The panel which is tucked inside must be 1/16" shorter than the other panels (3 5/8" vs. 3 11/16") so that the brochure will fold flat.

So, when placing copy for an 8 1/2" x 11" letterfold brochure, you should take care to use different margins for the tucked panel versus the other two, and leave sufficient gutters for the folds.