To organize a document thematically, you can use scenes. For example, you might use separate scenes for an introduction, a loading message, and credits. Though using scenes has some disadvantages, there are some situations in which few of these disadvantages apply, such as when you create lengthy animations.
Motion tweens can be used to create a fading in effect on objects or photos. Press F8 to turn an object into a graphic. In the properties panel under the 'co...