The file extension PPTM is the latest version of the Microsoft PowerPoint file format ppt. The PPTM format will be supported from the 2007 release (Mac 2008) of the worldwide presentation program. The file extension PPTM simply means Powerpoint Presentation Xml Macro-enabled, so a PowerPoint presentation in Office Open XML format with macros.
A PPTM file, like the old ppt files, can contain not only formatted text, lists, pictures, videos but also music and Excel spreadsheets, which are divided into boards or slides. In addition, many elements can be animated or fade in and out, as well as with different effects. Pptm files can also contain macros. These macros may contain malicious code, so you should run a virus scan before they run and always install the latest security updates for Microsoft Office.
PPTM is an XML-based file format (Office Open XML) that is unreadable with older versions of PowerPoint. For the Office versions 2000, 2003 and XP, however, this functionality can be retrofitted using the Microsoft Office Compatibility Pack, whereby the result of a scanned PPTM file does not always have to be 100% identical to the original.
Office Open XML is an open standard for office applications developed by Microsoft that aims to ensure file sharing between different office suites. For example, OpenOffice version 3 and above can read and process files saved in PPTM format.
A PPTM file consists of several XML files, which are automatically summarized as archives when saved using the ZIP algorithm. This saves space compared to the old format. Other benefits include increased data integrity and easier data recovery in the event of data loss.
Most often resolving problems with opening PPTM files is very simple. Just install an appropriate program that supports such files. All of the listed programs support PPTM files, but may vary in offered function and purpose. Some programs may be capable only of viewing contents of PPTM files or offer file conversion options, but may not be capable of editing such files.
It is possible that although a compatible program has been installed on user’s system, it is not used by the system to open it. This may happen because no default application was associated with this type of files. To associate PPTM files with given application, select "Open with" from drop-down menu (accessed by right-clicking on the file). Then select from the list the program or application you want to be used to open this type of file. If the PowerPoint applications is not on the list, select "Browse" option in order to manually locate the directory where PowerPoint has been installed.
Sometimes problems with opening PPTM files may not lie with the application itself, but can arise due to other causes, such as: