What keyboard shortcut is used to open an existing presentation in PowerPoint?

The keyboard shortcut used to open an existing presentation in PowerPoint is Ctrl + O. This combination is a universal command found in many software applications, allowing users to access and open files without navigating through the file menu. When you press these keys simultaneously, it prompts a dialog box that lets you browse your computer files to select the presentation you want to work on.

This functionality is essential for efficiency, as it saves time compared to manually going through the menu system. Understanding this shortcut can significantly enhance productivity, especially for users who frequently switch between different presentations.