How to convert PPTX format to PPT format
1. Use WPS Office to open the slides.
2. Click Menu in the upper-left corner and place the cursor on Save As. We can see that there are many file formats to choose from, such as dps, dpt, pptx, ppt, pot and pps. If we want to convert pptx format to ppt format, click *.ppt and click Save.
Or use the shortcut key F12 to open the Save As dialog box and choose the format you want.