Add a transition behavior

Select the screen to apply the behavior to.
In the Behaviors panel, click the Add (+) button.
Select Screen > Transition from the submenu.
Select a transition from the scroll list. An animated preview of the transition plays in the preview window, and a brief description of the transition appears in the description field. The animation changes to reflect options that you select for the transition in the following steps.
For Direction, select In to play the transition as the screen appears in the document, and Out to play the transition as the screen disappears from the document.
For Duration, enter a time in seconds.
For Easing, select an option to define the transition style.
If the transition has additional parameters, select options or enter values for those parameters in the fields provided.
Click OK.
In the Behaviors panel, in the Event column, click in the row for the new behavior and select an event from the list. This action specifies the event that triggers the behavior—for example, the mouse pointer moving over the screen.