viz.BACKDROP_NONE

No backdrop

viz.BACKDROP_RIGHT_BOTTOM

Offset backdrop towards the bottom right

viz.BACKDROP_RIGHT_CENTER

Offset backdrop towards the right side

viz.BACKDROP_RIGHT_TOP

Offset backdrop toward the top right

viz.BACKDROP_CENTER_BOTTOM

Offset backdrop towards the bottom

viz.BACKDROP_CENTER_TOP

Offset backdrop towards the top

viz.BACKDROP_LEFT_BOTTOM

Offset backdrop towards the bottom left

viz.BACKDROP_LEFT_CENTER

Offset backdrop towards the left

viz.BACKDROP_LEFT_TOP

Offset backdrop towards the top left

viz.BACKDROP_OUTLINE

Outline the text

viz.BACKDROP_BOX

Display filled bounding box behind text