Viewport.SmallSizeRatioMoving Property
Gets or sets the ratio to classify small entities. Small entities are hid during dynamic movements (Zoom/Pan/Rotate). Default value is 0.01. Use zero to disable.
This ratio is used by ComputeSmallSize to estimate SmallSizeMoving value in pixels.
The on screen object size is calculated approximating the size of the
object's bounding box. Most of the times, there is a big difference between
the actual pixel footprint and the SmallSizeMoving value.