1. First, open ppt in the local computer, find Insert-Text-Text Box in the top menu bar, click it, and then create a new text box in the slide.

2. Enter the text to be displayed in the newly created text box, and double-click the text box to edit the text.

3. Follow the above steps and add three other words.

4. Then click the first text box to select it.

5. Click Animation-Add Animation in the top menu bar, and select an animation effect in Animation Effect.

6. In the animation pane, starting from the second animation, add an animation effect of "Starting from the previous item" to each animation.

7. Finally, click "Slide Show"-"Start of current slide show" to play and see the setting effect.