A PDF file contains one or more page images, each of which you can zoom in on or out from. You can page forward and backward. Once your Presentation is converted to an Adobe PDF file, it can be opened from any Linux and Mac-based systems as long as they have at least Adobe Acrobat Reader installed on the Presentation computer. Adobe Acrobat Reader is a free application for Windows or Mac. Once your Presentation is converted to a PDF, open it in Adobe Acrobat and set it to view in full screen. The PDF file can now be projected just like a slideshow Presentation and you may also use your mouse or keyboard to navigate from one page to another.