Define a default View Mode: By default, PowerPoint opens in Normal View mode (thumbnails, comments and slide). However, if you want to, you can configure PowerPoint to open in a different mode, such as Slide Sorter or using variants Normal mode.
Thus you change the default settings in order to get the most appropriate mode for your work and PowerPoint will always open in this mode. Here's how to proceed:
1.Click on File.
2.Click on Options on the left side of the screen, and then on Advanced Options.
3 Use the drop menu next to "Open all documents using this view" to make your selection: