Q: How can I use “Edit in TextMate”?

A:
  • Install the TextMate InputManager by following the steps outlined in TextMate Help.
  • In Mailplane click on the "Plain Text" above the body text field. Rich Text editing isn't supported by the TextMate InputManager. Gmail will remember the setting, BTW.
  • Now use the "Edit->Edit in Textmate" menu item or press (Cmd-Control-E) to open the current message in TextMate

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