Thank you. I understand your answer. I use jpg because the blog I use will only permit me to upload jpg's. I didn't think Chrome had anything to do with the extensions offered by Paint.net but the posting (on this site) I was reading went into great (and confusing to me) detail about changing something in the Microsoft browser - didn't make sense to me but I'm no techie. I love Paint.net and will continue to use it but I wish there was a way to default to jpg. Peace.