One of my favourite Emacs keystrokes which made its way into bash and is now supported in most places in Mac OS X is Ctrl-T. It transposes the two letters around the cursor. This is one of my most common typos, and it’s very handy, if I accidentally type ‘tihs’, to put the cursor between the i and the h and press Ctrl-T.
Useful Mac hint of the day
June 26th, 2004