The description of these behaviors is termed the mechanism. When scientists are not provided with such a mechanism, then a description of a process, it's explanation, or it's understanding, is questioned. Astrology does not work with mechanisms. It works with relationships, patterns, tendencies, and interpretations. It does not always give a yes or no answer.
I hate the Drawing Canvas and I understand that it's not backward compatible, so I never use it. To turn it off in Word 2002 and above, go to Tools 4 Options, General tab. Untick Automatically create drawing canvas....
Open the .vss or .vsd files with Microsoft Visio. Open the .ppt file with PowerPoint. Open the PNG directory by extracting the contents to a folder and browsing the contents of the folder. Drag and drop or open a PNG file in your drawing application.