klm1

Thank-you so much EER and BoltBait! That was exactly what the problem was and saving in a different format has solved it. Now I can get back to work! Thanks again

Hi, I edit pictures in paint.net and one of the most important things is that the files are converted to black and white or bitmapped. I check by zooming in to about 400% to make sure that the picture is only black and white before saving but recently an issue has arisen where saving the file undoes this and when I zoom in I can see grey pixels. It's really important for my work that the files stay black and white so I would be very grateful of any advice! Many thanks