If you use Animation Schemes often in the earlier versions of PowerPoint, you will realize that PowerPoint 2007 has this feature removed. Now you might be thinking… “I have 100+ slides, do I have to add the same animations onto every slide manually?” The answer is no.
If you add your animations through the slide master, the animations will be applied onto every slide. In fact, this method works on earlier versions of PowerPoint such as PowerPoint 2000, 2002/XP, 2003.
Here’s the steps:
In PowerPoint 2007, click View > Slide Master.
On the Slide Master, select the content placeholder (the one that says “Click to edit Master text
Now, select Animation > Custom Animation.
Click Add Effect > Entrance > Fade (or any effect of your choice)
Once you are done with it, click Slide Master > Close Master View.