| Flex 2 Developer's Guide > Flex Programming Topics > Using Transitions | |||
View states let you change appearance of an application, typically in response to a user action. Transitions define how a change of view state looks as it occurs on the screen. You define a transition by using the effect classes, in combination with several effects designed explicitly for handling transitions. This topic describes how to define transitions to work with view states.
To use transitions, you should be familiar with how effects and view states work. For more information on effects, see Using Behaviors. For more information on view states, see Using View States.
Flex 2.01