Thank you so much for reply. I attached 4 screen shots of PDF export dialog. Please see them.
Also, my client send me mail with this message "The printing company told me: the problems are exactly the same (ink coverage and resolution). It seems you did not succeed to deliver a file that match the needs for Offset Printing. What do you know?"
I M STUPIED I DO NOT KNOW HOW TO EXPORT FOR OFFSET PRINTING. PLZ HELP ME
