Welcome to the Excel 2007 forum.
Excel had a major facelift in late 2006 and lots changed, file formats, grid size, charts, shapes, functions, ribbon, etc, etc.
If you feel your question is specific to a feature in 2007 only you can post it here. Of course you can also post specific questions in the other forums, even if you have 2007, but this forum helps to seperate questions in 2007 off so those with that version can chip in with answers/suggestions
Have fun
Regards
Nick Hodge
Microsoft MVP, Excel
Southampton, UK