How can I convert a text selection to upper case in Apple Mail with a keyboard shortcut Apple Mail version Version 6.6 (1510)
OS 10.8.5

Is there a keyboard shortcut for converting the case for a text selection in the message editor? I know I can right-click and access this from the transformations menu
Create ~/Library/KeyBindings/, save

{
  "~=" = uppercaseWord:;
}


as ~/Library/KeyBindings/DefaultKeyBinding.dict, and quit and reopen Mail. It makes ⌥= convert the selection or the word around the cursor to uppercase.

See http://www.hcs.harvard.edu/~jrus/site/cocoa-text.html or http://osxnotes.net/keybindings.html for more information.