You can only animate text that is contained in a drawing object, such as rectangles, lines, or text objects. For example, draw a rectangle, then double-click the rectangle and enter your text.
Select the drawing object containing the text that you want to animate.
Choose, and then click the tab.
In the Numbering Styles box, select the type of numbering that you want to use.
Set the properties of the effect, and then click OK.