PPTM - PowerPoint Open XML Macro-Enabled Presentation is one of the best file extensions around when it comes to creating presentations. If you know how to create different slideshows, you will definitely fall in love with this program extension. You can do a lot such as deal with images, layout, text, and much more. If you have a file that contains macros, it may not be able to be used by PowerPoint. You will have to make sure that you save the file under a PPTM file. You will then be able to run the macros afterwards. You will be able to open them up in PowerPoint 2007 or later. This is definitely a very great extension that is really worth using. You should really consider it if you need to.