Q: My PDF proof has lines all over it?
A: Atomic regions are “stitch” lines (dotted or solid) where transparency has been flattened. Viewed at a higher magnification they will either go away completely or remain as hairlines and will not appear in print.
Solution: You can only turn them off in Acrobat Professional (untick Smooth line art).
Screen below shows smooth line art has been disabled in Adobe Acrobat Professional and has stopped the lines appearing on screen.
A: The fastest way to display the PDF file in a PDF viewer is to display straight lines where possible.
Solution: View at higher magnification.
The thickness goes away.