Hi,
To show the content in slide one by one, you have to use the
Animation function.
First, display the specific slide:

Select the specific part of content, that has to be displayed in the step:

Click on
Animations and choose
Appear:

Then select the specific part of content, that has to be displayed in the next step:

And again click on
Animations and choose
Appear:

The preview of the slide should look like:
