The first button (yellow square) will toggle drawing of 2D bounding boxes
The second button (RGB cubeframe) will toggle 3D bounding box drawing
The third button (cursor over red square) will toggle clickbox geometry
drawing
The fourth button (cursor over cubeframe) switches between "draw all 3D
bounding boxes" and "draw bounding box for object under cursor" modes of
the 3D bounding box drawing.
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