John Walkenbach comments on the new Excel: Ive been using Excel for over 15 years & Excel 2007 is by far the most significant upgrade ever. For starters weve got a new user interface new open file formats a larger worksheet grid better use of memory & CPUs new functions & more templates. Dig a bit deeper & youll find worksheet tables 100 levels of undo easier formula construction better-looking charts unlimited color choices Smart Art a handy page layout view new conditional formatting options new collaboration features a very useful compatibility checker workbook themes-and even skins so you can change the look of the entire program." John Walkenbachs Favorite Excel 2007 Tips & Tricks consists of a series of non-trivial tips & tricks that cover all aspects of Excel. Tips are enhanced ways of maximizing the power of Excel to create robust applications. Tricks are shortcuts that will speed up application development with Excel. Johns favorites include tips & tricks on dealing with function arguments creating "impossible" charts pivot tables taming the new Ribbon why use a User Form how to create add-ins in Excel 2007 absolute vs. relative references changing data entry orientation overcoming the 7-level nesting limit dynamic chart data sorting on more than three columns entering fake data for testing purposes custom functions & much more."