If you want to use Word 2013's standard ready-made tri-fold template, click on "File" and then "New" and select "Brochure." Substitute the pictures and text for what you want to use.

Technology-Infused Tri-Fold Mailer - 60-Second Fold of the Week. ... This week, we're highlighting how a creative, high-tech solution can be applied to an everyday classic — the tri-fold.