What does the red line on my proof mean?

Articles in this section

• Will my printed job look exactly like it does on my computer monitor?
• What kind of changes can I request to my proof?
• What is SWOP?
• What if my proof colors don't appear as they should? (ex: black appearing as green).
• What does the red line on my proof mean?
• RGB vs. CMYK? Understanding the 2 is critical.
• Is blurriness on the proof normal or should I be concerned about the final product?
• I saw my proof and want to change it, how can I do it?
• I ordered a hard-copy proof. Do I have to return it?
• How long does it usually take to receive an online proof? Is there any way to rush this time?