The Icon field type is display-only — it renders an icon to the user but doesn't accept input. Use it when you want a visual cue on a list or detail page that's tied to a row's data, without giving the user something to click.
Conditional options
None.
Icon source
Defined by the row's underlying data — typically a separate field on the same row that stores the icon name or class. The Icon field renders whichever icon that row references.
Icon Select vs. Icon
For an interactive icon picker, use the Icon Select field type instead — it shows the icon palette and lets the user choose.