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....
When you do that, the Drawing Tools appear. To change multiple shapes or text boxes, click the first shape or text box, and then press and hold Ctrl while you click the other shapes or text boxes. On the Drawing Tools Format tab, click Text Fill and, under Theme Colors, pick the color you want.