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 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.
You can also focus on just the haloed points by right-clicking and selecting “Show Only Haloed” from the Contextual Menu.
Halo settings are found by clicking on the Halo dimension icon in the Mapping panel:
- Scale – Makes the halos larger or smaller
- On/Off – Turns the visibility of halos on and off without removing the mapped feature