Any suggestion?
Giuseppe
Save for Web is designed to produce the smallest possible file for uploading to a web page. You are not going to retain layers, vectors or alpha channels.
What are you trying to do? Why are you using Save for Web?
What I'm trying to do, Ramon, is teaching my students where Adobe put that options in the CS4 release...even if I'm an ACI I can't know everything...an ACI is not a clairvoyant :-)
Probably my english is getting worse, I do apologize for that.
Giuseppe
The resulting JPG does not have layers of course.
For CS4, it may have been dropped. Ozan was looking for this on January 15 in the comments section at the bottom of the page <http://help.adobe.com/en_US/Photoshop/11.0/WS29D0201B-A3E2-4339-9747-8FB540762EE3.html>.
I wasn't able to find it neither so maybe is definitively gone.
Giuseppe
It may be worth a continued search. Many things have been moved. While I am not at CS4 now, it was available in CS2 and CS3 so it is unlikely to have been a transient feature.