How to Change a PowerPoint Show (PPSX) to a Work File (PPTX) Share November 22, 2020 Dm4r Technology PowerPoint files come in two formats: PPTX files are editable PowerPoint presentations and PPSX files are a view-only format intended for presentations. You can edit a PPSX file, but you must first convert it back to a PPTX format. Read This Article on How-To Geek › Source : How to Change a PowerPoint Show (PPSX) to a Work File (PPTX)