When using PowerPoint, to play a PowerPoint show for previewing the show, select

• View, slide sorter

• View, slide

• View, slide show

• View Outline

...
Explanation:

To view a slide in full mode on the screen we usually use the slide show feature of Microsoft PowerPoint. To do this we need to

1. Click on View Tab first
2. Then click on Reading View (In version 2010 word "Slide Show" was replaced with "Reading View" in 2013).

You can see the result in the second image below. Also, We can do that by clicking on the F5 key on the keyboard.

Click to View in Full Screen

Full View of a Slide