Hi All - once dwg drawing is produced I export it to PDF so I can email to planning / clients. Problem is if the PDF file is printed it for some reason is not printing at the scale its been drawn it reduces in size.

for example a 3000mm wall measure 2850mm on the drawing. This has only just started to happen and I'm not sure how to correct it - PLEASE HELP so i can help save the world and reduce paper printing