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I took graphic design in school years ago, but have been out of the loop for quite some time. I recently created a vector logo for a friend for their business. I am wondering how to save the files so they have no background around the logo and so they can put on any form for print and rescale it to whatever size they wish. I also would like to give them one for their website. What would you recommend- and how to save it properly if you have specific instructions? I have saves a successful png for web use withough background... as well as an .ai file.