File Formats

PowerPoint 2007 uses the new Office XML format as its default file format, just like Microsoft Office Word 2007 and Microsoft Office Excel 2007. As a result, PowerPoint 2007 offers a new Save As default (which uses the file extension .pptx) when you save a document and also provides several other XML-related file format options for macros and templates. Chapter 32, provides an overview of XML itself, so we won’t go into great detail about it here except to remind you of a few key features of the XML file format in PowerPoint 2007: data compression, improved file recovery, and integration.

For PowerPoint 2007, the compression aspect is important—many presentations contain graphics and other data that can make file sizes quite large. ...

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