Hi, I've used TeXShop since its debut, back when Mac OS X replaced System 9. I'm a mathematical physicist, and use TeXShop daily, 24/7/366. As indicated in the "title", I do believe this program has been spearheading a new category of software: WishWare. Ten days ago, I wrote to Richard Koch, asking if a split view in the PDF preview window were possible... and received the answer that same-day, that it's implemented and ready for release! In the past, I have made similar suggestions, and everything I wished for (and much more!) is implemented. Oh... and it is free!!! Well, wishes are free, so it does seem befitting. Richard Koch, THANK YOU!! Cheers, Tristan