To create an natural-looking, cascading animation of objects entering quickly one after another, start by animating several objects with the same entrance effect. Choose Slide Show> Custom Animation (in PowerPoint 2007, choose Animations tab> Custom Animation). Select an object, and choose Add Effect> Entrance, and choose the effect you want. Here, I use the Appear effect for text.
Use a Start setting of With Previous for all but the first object. Then, click any animation item’s down arrow in the Custom Animation task pane, and choose Show Advanced Timeline. You now see orange rectangles representing the time covered by each animation.

Use a Start setting of With Previous
Starting from the second rectangle, drag each rectangle a little further to the right, so that each animation starts slightly after the previous one.

drag each rectangle
You can also click any item’s down arrow and choose Timing to set the timing precisely in a text box.
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