Hi all, A friend of mine called me other day with a question regarding presentation styles. He wanted to know how to include a "fade" effect on the whole slide except at one or two regions. In particular, he has this horrific math equation where he want to fade out most of it leaving out only the relevant part. From what I could understand, this would be similar to the fade effect at the OSX "System Preferences" window. In other words, he does not want to clear the whole slide but only fade what is not "important". Does anyone has a suggestion/idea how to make this effect as smooth as possible ? At first I thought about preparing a normal slide and then overlapping a second one on top of it but this is far from having a smooth transition. Thanks !