There are different ways of getting started using Google presentations: you can create a new online presentation, you can upload an existing one, or you can use a template from our templates gallery.
To create a new presentation, go to your Documents List, click the red Create button, and select Presentation from the drop-down menu.
As soon as you name the document or start typing, Google Docs will automatically save your work every few seconds. At the top of the document, you'll see text that indicates when your document was last saved. You can access your document at any time by opening your Documents List at http://docs.google.com.
To save a copy of a presentation to your computer, you can download it. In your document, go to the File menu and point your mouse to the Download as option. Select one of the following file types: PNG, JPEG, SVG, PPTX, PDF, or TXT. Your presentation will download to your computer.