The Open dialog box opens. Click the file you want to open to select it.
To locate the file in another folder or drive, click the Look In drop-down list, navigate to the folder or drive, and then select the file.
Click Open . PowerPoint opens the presentation.
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You can open a presentation you have previously saved in order to work on the slides some more. In addition, you can close a file you no longer want to work on, yet keep the PowerPoint window open to start new files.
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Using the Menu Method
You can also display the Open dialog box using the File menu. Select File, Open .
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Double-clicking
A quick method of opening a file from the Open dialog box is to simply double-click the filename.
To close a presentation, click the file's Close button.
PowerPoint immediately closes the presentation.
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Switching Between Multiple Files
You can open multiple files in PowerPoint and switch between them; use the Task bar or the Window menu to select which presentation to view.
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Saving First
If you have made changes to your presentation, PowerPoint prompts you to save your work before closing the file. Click Yes to save.
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Caution
Be careful not to click the program window's Close button, or you will end up closing PowerPoint entirely. The program window's Close button is located in the upper-right corner, directly above the file's Close button.