A keyboard shortcut would normally be shown in the View menu if it exists, and it isn't.
But you can set one up for yourself:
- Open System Preferences->Keyboard and Mouse->Keyboard Shortcuts.
- Click the + button at the bottom of the list.
- Select Application: Mail
- Enter 'Organize by Thread' in the menu name
- Enter a unique key combination - for example, I used Control/Alt/Command/T
You can also customize the toolbar and add the Threads icon to it.
Hope this helps.
Edited by deleted (Wed 05-Aug-09 10:06:32)