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Library: Creative Design


Seeing white lines? You aren't imagining them

Added on Monday 15th of February 2010 04:45 am EST


Application: Adobe InDesign CS/CS2/CS3
Operating Systems: Macintosh, Microsoft Windows

Every once in a while, when you aren’t expecting it, thin white lines may appear in your InDesign documents or exported PDFs. You may wonder what causes the lines, and is there a way to prevent them from occurring in the first place. Fortunately they’re harmless, but if you’re looking to point the finger, blame your transparency flattener settings.
All transparency must be flattened (cut into flat pieces) and, depending on your transparency flattener settings, this may cause the rasterization of low-resolution items. These items sometimes appear not to line up, creating the appearance of thin white lines or gaps, as shown in Figure A. The technical term is “display artifacts.â...