According to the textbook, in terms of slide design and layout, a common layout design is to divide the slide into two imaginary lines horizontally and two vertically, ending up with nine imaginary sections on the slide. The strategy in this layout is that the most visually interesting and pleasing portions of the screen will be at the point where the imaginary lines intersect. According to the textbook, what is the specific "term" (label) for this layout design strategy? Group of answer choices crisscross method white space to squares background and effects a rule of thirds axis points method