Unable to launch slideshow from finder

In Tiger OS. there was a slideshow option for pictures accesible directy from finder. In the new leopard, when I control+click a picture file or more, I can't find slideshow on the list.

How can I enable this feature?

Finder:
Although the normal quick look key in finder is the spacebar:
It's also available on the toolbar as an eye icon.
Select the pictures (command a if you want all of them) click on the eye icon or the spacebar and the slideshow option will be on the bottom of the quick look window.

Command y will also show selected pictures in Quicklook
command option y will show them in a slideshow.

The slideshow is also available in Preview.
Select the pictures and double click to open in Preview and the slideshow option will be on the toolbar. Use customise toolbar to add it if it's missing.
S.

Thanks for the quick and very thorough response.
Great! now I don't have to open viewer first.

Thanks a lot