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3 Corrected image
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I installed a third party utility to remap these keys on my MacBook Pro running OS X 10.8. Here are the steps I used:

(1) Download and install KeyRemap4MacBook.app

(2) Edit (or create) the following file in a text editor:

~/Library/Application Support/KeyRemap4MacBook/private.xml

...so that its content is:

<?xml version="1.0"?>
<root>
<item>
        <name>JKLI to Arrow Keys</name>
        <identifier>private.jkli_to_arrow_keys</identifier>
        <autogen>
            __KeyToKey__
            KeyCode::J, ModifierFlag::FN,
            KeyCode::CURSOR_LEFT
        </autogen>
        <autogen>
        __KeyToKey__
            KeyCode::K, ModifierFlag::FN,
            KeyCode::CURSOR_DOWN
        </autogen>
        <autogen>
        __KeyToKey__
            KeyCode::L, ModifierFlag::FN,
            KeyCode::CURSOR_RIGHT
        </autogen>
        <autogen>
        __KeyToKey__
            KeyCode::I, ModifierFlag::FN,
            KeyCode::CURSOR_UP
        </autogen>
</item>
</root>

(3) Select "Preferences" from the little KeyRemap4MacBook icon in the OS X MenuBar at the top of the screen.

KeyRemap4MacBook > PreferencesKeyRemap4MacBook > Preferences

(4) In KeyRemap4MacBook's "Change Key" tab, tick "JKLI to Arrow Keys". (if this option doesn't appear, you may need to click the "ReloadXML" button)

KeyRemap4MacBook > Change Key

You should now be able to use the Function key with J|K|L|I to control the cursor, in addition to the Arrow keys.

I installed a third party utility to remap these keys on my MacBook Pro running OS X 10.8. Here are the steps I used:

(1) Download and install KeyRemap4MacBook.app

(2) Edit (or create) the following file in a text editor:

~/Library/Application Support/KeyRemap4MacBook/private.xml

...so that its content is:

<?xml version="1.0"?>
<root>
<item>
        <name>JKLI to Arrow Keys</name>
        <identifier>private.jkli_to_arrow_keys</identifier>
        <autogen>
            __KeyToKey__
            KeyCode::J, ModifierFlag::FN,
            KeyCode::CURSOR_LEFT
        </autogen>
        <autogen>
        __KeyToKey__
            KeyCode::K, ModifierFlag::FN,
            KeyCode::CURSOR_DOWN
        </autogen>
        <autogen>
        __KeyToKey__
            KeyCode::L, ModifierFlag::FN,
            KeyCode::CURSOR_RIGHT
        </autogen>
        <autogen>
        __KeyToKey__
            KeyCode::I, ModifierFlag::FN,
            KeyCode::CURSOR_UP
        </autogen>
</item>
</root>

(3) Select "Preferences" from the little KeyRemap4MacBook icon in the OS X MenuBar at the top of the screen.

KeyRemap4MacBook > Preferences

(4) In KeyRemap4MacBook's "Change Key" tab, tick "JKLI to Arrow Keys". (if this option doesn't appear, you may need to click the "ReloadXML" button)

KeyRemap4MacBook > Change Key

You should now be able to use the Function key with J|K|L|I to control the cursor, in addition to the Arrow keys.

I installed a third party utility to remap these keys on my MacBook Pro running OS X 10.8. Here are the steps I used:

(1) Download and install KeyRemap4MacBook.app

(2) Edit (or create) the following file in a text editor:

~/Library/Application Support/KeyRemap4MacBook/private.xml

...so that its content is:

<?xml version="1.0"?>
<root>
<item>
        <name>JKLI to Arrow Keys</name>
        <identifier>private.jkli_to_arrow_keys</identifier>
        <autogen>
            __KeyToKey__
            KeyCode::J, ModifierFlag::FN,
            KeyCode::CURSOR_LEFT
        </autogen>
        <autogen>
        __KeyToKey__
            KeyCode::K, ModifierFlag::FN,
            KeyCode::CURSOR_DOWN
        </autogen>
        <autogen>
        __KeyToKey__
            KeyCode::L, ModifierFlag::FN,
            KeyCode::CURSOR_RIGHT
        </autogen>
        <autogen>
        __KeyToKey__
            KeyCode::I, ModifierFlag::FN,
            KeyCode::CURSOR_UP
        </autogen>
</item>
</root>

(3) Select "Preferences" from the little KeyRemap4MacBook icon in the OS X MenuBar at the top of the screen.

KeyRemap4MacBook > Preferences

(4) In KeyRemap4MacBook's "Change Key" tab, tick "JKLI to Arrow Keys". (if this option doesn't appear, you may need to click the "ReloadXML" button)

KeyRemap4MacBook > Change Key

You should now be able to use the Function key with J|K|L|I to control the cursor, in addition to the Arrow keys.

2 Trying to post the screen shots, but I may not have sufficient rep yet?
source | link

I installed a third party utility to remap these keys on my MacBook Pro running OS X 10.8. Here are the steps I used:

(1) Download and install KeyRemap4MacBook.app

(2) Edit (or create) the following file in a text editor:

~/Library/Application Support/KeyRemap4MacBook/private.xml

...so that its content is:

<?xml version="1.0"?>
<root>
<item>
        <name>JKLI to Arrow Keys</name>
        <identifier>private.jkli_to_arrow_keys</identifier>
        <autogen>
            __KeyToKey__
            KeyCode::J, ModifierFlag::FN,
            KeyCode::CURSOR_LEFT
        </autogen>
        <autogen>
        __KeyToKey__
            KeyCode::K, ModifierFlag::FN,
            KeyCode::CURSOR_DOWN
        </autogen>
        <autogen>
        __KeyToKey__
            KeyCode::L, ModifierFlag::FN,
            KeyCode::CURSOR_RIGHT
        </autogen>
        <autogen>
        __KeyToKey__
            KeyCode::I, ModifierFlag::FN,
            KeyCode::CURSOR_UP
        </autogen>
</item>
</root>

(3) Select "Preferences" from the little KeyRemap4MacBook icon in the OS X MenuBar at the top of the screen.

http://i.stack.imgur.com/X945y.pngKeyRemap4MacBook > Preferences

(4) In KeyRemap4MacBook's "Change Key" tab, tick "JKLI to Arrow Keys". (if this option doesn't appear, you may need to click the "ReloadXML" button)

http://i.stack.imgur.com/31zBm.pngKeyRemap4MacBook > Change Key

You should now be able to use the Function key with J|K|L|I to control the cursor, in addition to the Arrow keys.

(1) Download and install KeyRemap4MacBook.app

(2) Edit (or create) the following file in a text editor:

~/Library/Application Support/KeyRemap4MacBook/private.xml

...so that its content is:

<?xml version="1.0"?>
<root>
<item>
        <name>JKLI to Arrow Keys</name>
        <identifier>private.jkli_to_arrow_keys</identifier>
        <autogen>
            __KeyToKey__
            KeyCode::J, ModifierFlag::FN,
            KeyCode::CURSOR_LEFT
        </autogen>
        <autogen>
        __KeyToKey__
            KeyCode::K, ModifierFlag::FN,
            KeyCode::CURSOR_DOWN
        </autogen>
        <autogen>
        __KeyToKey__
            KeyCode::L, ModifierFlag::FN,
            KeyCode::CURSOR_RIGHT
        </autogen>
        <autogen>
        __KeyToKey__
            KeyCode::I, ModifierFlag::FN,
            KeyCode::CURSOR_UP
        </autogen>
</item>
</root>

(3) Select "Preferences" from the little KeyRemap4MacBook icon in the OS X MenuBar at the top of the screen.

http://i.stack.imgur.com/X945y.png

(4) In KeyRemap4MacBook's "Change Key" tab, tick "JKLI to Arrow Keys". (if this option doesn't appear, you may need to click the "ReloadXML" button)

http://i.stack.imgur.com/31zBm.png

You should now be able to use the Function key with J|K|L|I to control the cursor, in addition to the Arrow keys.

I installed a third party utility to remap these keys on my MacBook Pro running OS X 10.8. Here are the steps I used:

(1) Download and install KeyRemap4MacBook.app

(2) Edit (or create) the following file in a text editor:

~/Library/Application Support/KeyRemap4MacBook/private.xml

...so that its content is:

<?xml version="1.0"?>
<root>
<item>
        <name>JKLI to Arrow Keys</name>
        <identifier>private.jkli_to_arrow_keys</identifier>
        <autogen>
            __KeyToKey__
            KeyCode::J, ModifierFlag::FN,
            KeyCode::CURSOR_LEFT
        </autogen>
        <autogen>
        __KeyToKey__
            KeyCode::K, ModifierFlag::FN,
            KeyCode::CURSOR_DOWN
        </autogen>
        <autogen>
        __KeyToKey__
            KeyCode::L, ModifierFlag::FN,
            KeyCode::CURSOR_RIGHT
        </autogen>
        <autogen>
        __KeyToKey__
            KeyCode::I, ModifierFlag::FN,
            KeyCode::CURSOR_UP
        </autogen>
</item>
</root>

(3) Select "Preferences" from the little KeyRemap4MacBook icon in the OS X MenuBar at the top of the screen.

KeyRemap4MacBook > Preferences

(4) In KeyRemap4MacBook's "Change Key" tab, tick "JKLI to Arrow Keys". (if this option doesn't appear, you may need to click the "ReloadXML" button)

KeyRemap4MacBook > Change Key

You should now be able to use the Function key with J|K|L|I to control the cursor, in addition to the Arrow keys.

1
source | link

(1) Download and install KeyRemap4MacBook.app

(2) Edit (or create) the following file in a text editor:

~/Library/Application Support/KeyRemap4MacBook/private.xml

...so that its content is:

<?xml version="1.0"?>
<root>
<item>
        <name>JKLI to Arrow Keys</name>
        <identifier>private.jkli_to_arrow_keys</identifier>
        <autogen>
            __KeyToKey__
            KeyCode::J, ModifierFlag::FN,
            KeyCode::CURSOR_LEFT
        </autogen>
        <autogen>
        __KeyToKey__
            KeyCode::K, ModifierFlag::FN,
            KeyCode::CURSOR_DOWN
        </autogen>
        <autogen>
        __KeyToKey__
            KeyCode::L, ModifierFlag::FN,
            KeyCode::CURSOR_RIGHT
        </autogen>
        <autogen>
        __KeyToKey__
            KeyCode::I, ModifierFlag::FN,
            KeyCode::CURSOR_UP
        </autogen>
</item>
</root>

(3) Select "Preferences" from the little KeyRemap4MacBook icon in the OS X MenuBar at the top of the screen.

http://i.stack.imgur.com/X945y.png

(4) In KeyRemap4MacBook's "Change Key" tab, tick "JKLI to Arrow Keys". (if this option doesn't appear, you may need to click the "ReloadXML" button)

http://i.stack.imgur.com/31zBm.png

You should now be able to use the Function key with J|K|L|I to control the cursor, in addition to the Arrow keys.