[From a birds' eye view]

• center (center circle) 
• forward (towards the top of the page/screen)
• backward (towards the bottom of the page/screen)
• right (towards the right side of the page/screen)
• left (towards the left side of the page/screen)
• diagonal forward right 
• diagonal forward left
• diagonal backward right
• diagonal backward left 

[future categories]

• Where should the body be displayed? Within the space or at outside of the space.
• vertical heights of the space  
• dividing directions into smaller angles