group button "+" change position
 

Hi, in other versions of Excel i could change the position of the "+" button
when group rows at Excel Worksheets.
But, i have now the new version of Excel 2007, and i use the group option,
but i couldn't find the option of change the position of the "+" button that
standard appear in the bottom part, and i need that this button saty in the
upside of a group.