MLxS

Ash, Thanks for that. I guess I hadn't really thought of looking outside of Paint's help / forum - was looking for an answer relating to the slider in Paint.Net Anyway, since I keep finding links to outside sites that would answer my question except the site's dead, Ash's link provides the info below:

Dear All, I'm sorry if this question has been asked and answered elsewhere, but I couldn't find it in a search of JPG/JPEG and quality. If I save a PDN as a JPG using 100% quality is this still a lossy format? Does 100% quality mean it retains all detail and therefore is not lossy despite the technical definitions of JPG? (Feature suggestion - and I think this has already been said which is why I'm not posting separately: Context help / explanation box with the quality slider for each image format.) P.S.: Don't worry about telling me about PNG and all the other wonderful image formats - I'm only interested in whether 100% JPG is lossy! Cheers, Alan