Halo can be used to highlight a particular category by circling points in that category with rings.
Halos are useful to highlight a category that has very few members, which can be selected using the dropdown menu from the Input tab of Mapping panel. When used on a category with a large number points, the visualization can become too crowded – in these cases, the dimensions Transparency or Pulsation may be better.
Halo settings are found by switching to the Others tab on the Mapping panel :
- Scale – Makes the halos larger or smaller
- Visibility On/Off – Turns the haloed points on and off (this can also be done via the right-click Contextual Menu)