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....
In Photoshop, you can draw with any of the shape tools, the Pen tool, or the Freeform Pen tool. Options for each tool are available in the options bar. Before you begin drawing in Photoshop, you must choose a drawing mode from the options bar. The mode you choose to draw in determines whether you create a vector shape on its own layer, a work path on an existing layer, or a rasterized shape on an existing layer. Vector shapes are lines and curves you draw using the shape or pen tools.