This document discusses how to add interactivity to graphical animations by creating buttons. It explains the four button states - up, over, down, and hit. The hit state controls the area where the user must place the mouse to trigger changes. Buttons are created by drawing an image, converting it to a symbol, and selecting the button option. Keyframes are added to the button states to control its appearance during different interactions. The hit keyframe image must be copied to a new layer in the same location to define the interactive area without being visible. The task is to create an animation with at least three interactive buttons.