File created by InCopy, a professional collaborative writing and editing program; contains default or customized document presets; customizable settings include: whether the pages are facing, the width, depth, and measurement units of a text area and the width and height of the page size.

To create a new ICST file, select File → Document Presets → Define..., click New..., choose your settings, name your preset, click OK, click Save, name the presets file, choose the save location, and click Save. To open your ICST file, select File → Document Presets → Define..., click Load..., navigate to your file, select it, and click Open.