Uh-oh, I sometimes take the easy way out (i.e., use whatever format is supported by the software I have in front of me)...Text & Clipart -- GIF or PNG formatScreenshots from Window -- PNG formatVideo & Photographs screenshots -- JPG formatThe article explains it more and also includes images comparing quality.http://www.labnol.org/software/tutorials/best-file-format-for-screensho…