How to filter messages in Thunderbird from body content

[info]

Scott Edwards wrote:
> On Fri, Jul 11, 2008 at 11:17 PM, Alec Shaw <shaw.alec at gmail.com> wrote:
>   
>> Tools -> Message Filters... -> New -> change pull down Subject to Body
>>     
>
> body isn't in the list.  maybe this version is too old? or it only
> affects windows builds? (too bad work won't let me dual boot)
>
> Thanks
>
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>   
If customize is in the list, select customize and put body in.