What Is a .PPTX File?

A quick read through any listing of electronic files may make a person's head spin with all the seemingly nonsensical collections of letters strung together to make file extensions. But those file extensions actually speak volumes, telling not just what software they represent, but sometimes the version of the program as well. When you see the .pptx in your window, you know you're working with the latest version of a Microsoft PowerPoint slideshow file.

History

Since its inception, the Microsoft PowerPoint software produced output files with an extension of PPT (for PowerPoint). This lasted through many iterations of the software up through the company's release of the Microsoft Office Suite 2007. That software went through a major overhaul, including replacing its interface of menus and toolbars with tabs and ribbons. One of the other major changes involved file saving extensions. Along with some of its Suite partners such as Word, which went to DOCX, Microsoft PowerPoint's slideshow presentation files received the PPTX extension.

Purpose

That "X" in the extension file format may grab users' attention, but it doesn't necessarily mark any important spots. For code-writing enthusiasts, the "X" symbolizes Microsoft's dip into the XML pool, extensible markup language. Previously, the PPT extension restricted presentations to a binary format. For general PowerPoint users who just want to compile slideshows and presentations, the "X" means no changes to their interface and functionality.

Function

Except for coders looking to use XML with PowerPoint, people seeking to create PPTX files are all in the same boat -- they want to design electronic presentations. PPTX files come in handy for tasks such as employee training, product demos, step-by-step tutorials, quizzes, and even non-corporate options, such as family vacation slideshows and wedding presentations. Aside from the differences in the way the old PPT interface was laid out compared to the PPTX structure, compiling a PowerPoint is the same. Users add slides, add text boxes, add images and create the flow from beginning to end.

Considerations

While the PPTX extension itself doesn't really have many drawbacks or considerations, its indication of using the latest version of Microsoft PowerPoint may cause some problems. PowerPoint's latest version as of July 2011 was the Microsoft Office Suite 2010 package. Although PowerPoint 2010, which saves files in the PPTX format, may open files created and saved in earlier versions of PowerPoint with the PPT extension such as PowerPoint 2003, some of the fonts, formatting and general design and layout may be skewed. Users going from one to the other should take caution to review their slides and make any adjustments before presentation day. One last consideration is sending a PPTX file to a user with a much earlier version of PowerPoint. Among the potential problems are the user not being able to open the file at all or the elements of the slides looking completely jumbled or garbled upon opening.

References

• Microsoft Office: PowerPoint 2010 Features and Benefits