What should I include in my file design for items with folds or die cuts?

For folded or die-cut items, the file should make the structure obvious so nothing is guessed during production. Spell out where the piece folds and where it cuts.

• Fold lines: mark where each fold sits and the fold type, such as zig-zag or trifold.
• Die-cut shape: include the outline of the final cut.
• Bleed: extend artwork past the trim where appropriate.
• Guides: use colored lines to distinguish boundaries, for example pink for trim lines.

Prepress may ask for clarification to protect the structural integrity of the finished piece, so a quick mockup of the folds helps.