Hi Paul
its a worry for me to as I do a lot of warrant and planning applications and they are submitted through the government planning portal so now I dont know for sure what is visible. I have never had a problem with Microsoft Edge to read the pdfs but would seem I may need to check the pdfs using acrobat to see if there is a problem. But even if there is I dont at present know how to sort it as the problem only seems to affect some but not all the drawings