How to open PPS / PPSX file

As you probably know, PPS / PPSX and PPT / PPTX are really the same, but the way PowerPoint handles them is different. PPS / PPSX will be played full-screen on double-click, while PPT / PPTX will open for edit.

On Office 2003 and earlier, to "convert" PPS files to PPT, you just need to change the extension. But on Office 2007 it takes more mouse clicks, but it's still really easy.

Follow these steps to change ppsx to pptx:

1. Open PowerPoint 2007.
2. Close the new empty slideshow but leave PowerPoint open.
3. Drag or open (File > Open...) the PPSX file in PowerPoint.
4. Save the file as PPTX.

It's as simple as that.