[Typo3-dev] tt_news using multiple categories

[Louis Montagne]

Dear list,
  I'm using multiple categories for news articles. I'd like to be able 
to filter the news items having exactly the categories I defined. (like 
using an AND between the categories I chose in the news plugin.)
Do you have an advice on where to put this option ?
What would be best :
- adding a checkbox ?
- adding a new item in the 'Category mode' list ? (Show items with ALL 
selected categories)
Thanks a lot for any advice/hint

yours,
	Louis Montagne.