A family of Microsoft presentation graphics products that offer tools for creating presentations and adding graphic effects like multimedia objects and special effects with text.
Displaying an thumbnail as the icon view depends on a PowerPoint option and a view choice.
To set the option in PowerPoint, choose File>Info, click on the Properties heading and choose Advanced Properties. Select the Summary tab and check the box beside Save preview picture.
To set the view option in Windows, choose to display a folder with Medium Icons, Large Icons, or Extra Large Icons. Small icons, List and Detail views will not show the thumbnails.