Under Lion the NumPad Commander 5 button is now perform action. That is the 
same as VO Spacebar.
However on my setup at least control numpad 5 produces a mouse click. I cannot 
honestly remember if I set this up or whether it comes by default.
It is easy to set up if this is not the default.David Griffith. 
On 16 Apr 2012, at 00:33, Esther wrote:

> Hi Mike,
> 
> Double-clicking on the horizontal splitter with VO-Shift-Space (e.g., by 
> holding down the Control, Option, and Shift keys while double tapping the 
> space bar) used to work in Leopard to hide the Preview pane.  I think this 
> ability went away in Snow Leopard.  There are definitely other examples of 
> instances where you need a "hardware" key click to work.  I think that you 
> may be able to press the "5" key on the numeric keypad with NumPad Commander 
> to click, as well, but since I use a laptop I'd have to attach a USB numeric 
> keypad to try this.
> 
> HTH.  Cheers,
> 
> Esther
> 
> On Apr 15, 2012, at 12:56 PM, Mike Arrigo wrote:
> 
>> I do find that moving through messages is more responsive with the preview 
>> pane turned off. Interesting that the voiceover click mouse command doesn't 
>> work here, but it definitely does not.
>> On Apr 15, 2012, at 1:56 PM, Esther wrote:
>> 
>>> Hi Anne,
>>> 
>>> Just as an added comment, in situations like this one, where I want to make 
>>> sure that the mouse pointer doesn't move when I double click, and a 
>>> physical click with trackpad or mouse is required, I use mouse keys instead 
>>> to perform the click.  After routing my mouse cursor to the VoiceOver 
>>> cursor with VO-Command-F5, I quickly press the option key 5 times to turn 
>>> on mouse keys, then I double tap the "i" key instead of performing a double 
>>> click with mouse or trackpad, and turn mouse keys off again by quickly 
>>> pressing the option key 5 times.  As you know, this requires having the box 
>>> in the System Preferences > Universal Access > Mouse & Trackpad tab checked 
>>> for "Press the Option key five times to turn Mouse Keys on or off".  This 
>>> will work whether or not Trackpad Commander is turned off.  Also, you can 
>>> additionally check the option for "Ignore built-in trackpad when Mouse Keys 
>>> is on" if you press (with VO-Space) the button for "Trackpad Options…" on 
>>> the Mouse & Trackpad tab of the Universal Access menu of System Preferences 
>>> in Lion.
>>> 
>>> This is for cases where people have difficulty with clicking the mouse or 
>>> trackpad without moving the pointer, but it's useful in general to know.  
>>> It's most useful when using applications which are transitioning in 
>>> accessibility, where neither VO-Space or VO-Shift-Space will work to click 
>>> on controls, and you need to perform physical clicks.  Turning mouse keys 
>>> on and clicking with the "i" key always works as an alternative in these 
>>> instances.
>>> 
>>> HTH.  Cheers,
>>> 
>>> Esther
>>> 
>>> On Apr 15, 2012, at 7:43 AM, Anne Robertson wrote:
>>> 
>>>> Hello Franc,
>>>> 
>>>> First of all, you need to be in classic view to do this. You also need to 
>>>> have the Trackpad Commander turned off.
>>>> 
>>>> Go to the horizontal splitter above the body of the message using the VO 
>>>> keys, then bring the mouse (VO-Cmd-F5) and double click using either the 
>>>> trackpad or the mouse, depending on what kind of computer you have. If you 
>>>> move the mouse pointer even slightly before the double click, it won't 
>>>> work.
>>>> 
>>>> Cheers,
>>>> 
>>>> Anne
>>>> 
>>>> 
>>>> On 15 Apr 2012, at 16:10, Frank Ventura wrote:
>>>> 
>>>>> Hi all, I am using a Mac with the latest of Lion. Can anyone tell me how 
>>>>> to disable the preview pane in Mac mail. I had some old directions for, I 
>>>>> think, Leopard but they don't seem to work.
>>>>> Thanks
>>>>> Frank
>>>>> 
>>>>> 
>>> 
>>> 
> 
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