MS Power Point
What is the use of Researching Timings?

This option allows you to rearrange slides
This option allows you to rehearsal of slide presentation
This option allows you to set the time of animations
There is no such option in PowerPoint

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MS Power Point
How to change the order of Slides in Presentation?

On Slide Sorter View, click on the slide and drag to required position
Slides order cannot be changed once it created
On Slide Sorter View, click on the Soft Slides
On Slide Thumbnail view, click on the slide and drag to required position

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