2.  The head seems to be glued to the upper screen
edge.
 You need to leave some headroom to
counteract the magnetic pull of the upper of the
upper screen edge.
 You can learn more about the pull of the top
edge of a frame by studying a painting of old
masters

3. Without headroom
the attraction of
the upper screen
edge pulls the
head firmly
against it.

4. To counteract the
pull of the upper
screen edge, you
must leave enough
headroom.

7.  Upper left to lower-right because the way the
picture is tilted draws the eye in the direction
its going. The downhill vector makes the eye
perceive the object to be in motion.

8. 1. Overlapping planes
2. Relative size
3. Height in plane
4. Linear perspective
5. Aerial perspective