How to Open a .Pptx Document in Open Office
Knowing how to open PPTX files in OpenOffice may save you a considerable amount of frustration. OpenOffice is free software for word processing, databases, spreadsheets, presentations and graphics. The extension ".Pptx" is found at the end of a 2007 Microsoft Powerpoint document. You must have the third version of OpenOffice to be able to open PPTX files. Opening a PPTX file in OpenOffice takes less than a minute.
Download the newest version of OpenOffice. (See Resources for the link.)
Left-click "Next," then "Unpack" to begin the automatic installation process.
Right-click the ".Pptx" file and select "Open With" and select "OpenOffice Impress."