[TxMt] bracket matching feature??

[ke han]

I have playing with TextMate for about a week and don't seem to find  
a "bracket" matching feature.
Example, when I double click on a { or [ or (, the match closure is  
found and all code in between is highlighted.  Or something to that  
effect.  I have seen other editors simply highlight both the begin  
and end characters when the cursor is on one of them.
Am I missing something obvious or does this not exist?
thanks, ke han