Yes, there is a shortcut key combination to toggle the display of group outline symbols in Excel 2007. Here are the steps to do it:
- Press the "Alt" key on your keyboard to activate the ribbon menu.
- Press the "H" key to activate the "Home" tab.
- Press the "O" key to activate the "Outline" dropdown menu.
- Press the "U" key to toggle the display of group outline symbols.
Alternatively, you can use the following shortcut key combination:
- Press the "Alt" key on your keyboard to activate the ribbon menu.
- Press the "J" key to activate the "View" tab.
- Press the "G" key to toggle the display of group outline symbols.
These shortcut key combinations should work in Excel 2007 and later versions.