Crop Marks inside Trim

What it means: This happens when supplied artwork (typically a PDF) has been placed into a layout, but the artwork was not sized or positioned properly resulting in crop marks or other registration marks that may end up being visible in the final printed magazine. If supplied artwork is sized and placed properly, this problem generally will not be present. Problems caused: The crop marks would be present in the final printed product. How to fix: The placed image may need to be re sized and/or the picture box it’s imported into may need to be adjusted so that the crop marks are not visible within the picture box.