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I have a gesture for Exposé so I need another button (the F3) to do the same. I'd love to replace F3 to show/hide the MacBartender app.

Here's where I assign a keyboard shortcut to MacBartender

Would it be possible to reassign this key for such a use? I have KeyRemap4MacBook installed but it does not allow for changing individual keys (I either change all my function keys or none at all).

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up vote 2 down vote accepted

FunctionFlip allows you to change the function keys individually.

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Worked perfectly, thanks very much! – Maiasaura Aug 2 '12 at 21:20
I'm glad it worked. If you click the check button under the voting options, you'll "accept" my answer as correct. (If I remember correctly, you'll get a few reputation from doing it, too.) – CajunLuke Aug 2 '12 at 21:24
Not to worry, I am a SO user myself. I couldn't do it because it was too soon and I was planning to come back anyway. ;) – Maiasaura Aug 2 '12 at 21:34
@Maiasaura OK. Thanks for the accept. – CajunLuke Aug 2 '12 at 21:46

KeyRemap4MacBook does allow changing individual media keys.

Save something like this as private.xml:

<?xml version="1.0"?>
    <name>Change Expose to F19</name>
    <autogen>--KeyToKey-- KeyCode::EXPOSE_ALL, KeyCode::F19</autogen>

Press the ReloadXML button and enable the remapping in the first tab.

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