Safety Margines: Text and impor tant images fall within the red boxes. Extending important elements beyond these lines can cause problems during cutting folding and assembly. Parts of images or text can end up trmmed of or fall directly on a fold.
Cut Lines: This is spproximately where your artwork will be trimmed. Keeping all text and important images inside the 1/18th inch safety margines will prevent their unintended loss during cutting.
Bleeds: This area is going to be completely trimmed away during the cutting process. Only solid colors, background images or foreground images that iintentionally run off the page should extend through this area. Having bleeds ensures that your artwork will not have a thin white border around it