A PPTM, or PowerPoint Open XML Macro-Enabled, file extension is used to save elements of a PowerPoint slide show such as movies, images, sound effects, transitions, formatted text, bullet points, headings, etcetera. This file format is very similar to the PPSX file format, which saves documents as a collection of separate files in a compressed zip file, except that it allows the user to execute macros. PPSX files must be saved as PPTM files before these macros are able to be used. PPTM files are used for saving and editing macro-enabled slide shows created with PowerPoint 2007 or newer. If you are having a problem opening a PPTM file, you may be using the 2003 version or earlier, which saves presentations using a PPS or PPT file extension.
The PPTM file type is primarily associated with 'Power Point' by Microsoft Corporation.This is the new format for Microsoft Office documents.It is a combination of XML architecture and ZIP compression for size reduction.Microsoft promises the format will be open (published for anyone to use) and prior versions of Office, using components provided by Microsoft for Office 2000, XP, and 2003 will be available to perform document conversion. Remember that these are promises by Microsoft. We have yet to see the actuals. This format is not the same as the OpenDocument standard, also an XML-based standard being developed as a true open standard (see the OpenDocument Fellowship for more information).
Developed by: Microsoft Corporation
MIME type : application/vnd.ms-powerpoint.presentation.macroEnabled.12