Why is it that when a good PPT is played, all the pictures and words appear together, not just the mouse?

For example, when a slide comes out, when you click it, the text will appear. How should I set it?

Select the content to appear, right-click, select the custom animation option, and select a good effect. If you can't find the right button, you can also select the text and use the menu command Slide Show → Custom Animation. Or select the text and press the shortcut key "Alt D→M" (press Alt all the time, then press d and m). So you can choose the effect on the right.

The picture is the same.