![]() Microsoft introduced the Open XML format for PowerPoint presentations in 2007 hence files with this extension cannot be opened with previous PowerPoint versions. pptx files even if it has macros in it, apart from that both formats have similar features. pptx is that macros can be executed in files with this extension whereas it is not possible to execute macros in. This feature is especially helpful to create presentations for the academic, marketing and business domains where a large amount of content needs to be stored. The presentation pages that are termed as slides comprise of text, images, videos, graphs and other components including media files that are required in a presentation. pptm extension file is a macro enabled open XML, Microsoft PowerPoint Presentation file. PPTM PowerPoint 2007 Macro-Enabled Presentation A.
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