When you finish using PowerPoint, you can exit the application. This closes any open presentations (PowerPoint might prompt you to save changes to those presentations).
To exit PowerPoint, perform one of the following:
Click the PowerPoint window's Close (X) button.
Double-click the Control Menu icon in the left corner of the title bar, or click it once to open the Control menu and then select Close.
Open the File menu and select Exit .
Press Alt+F4 .