If this value is set to zero, all markers defined by the Marker Units or Annotation Location Variable Units options are used to define the nearest neighbor samples.
Make sure that the Select Neighbor Markers with strongest LD within Baseline Unit check box has been checked.Tip: To change the scale of the slider, right-click on the slider and select from the pop-up menu. Change the upper and/or lower boundaries in the window that appears, to rescale the slider and click .