Underlings

Which (e.g., Unity game, web app, or GIS map) are you building this "Underlings" feature for?

If "Underlings" refers to a specialized visual underline for text in a digital product: Underlings

If you are using to create a "feature class" that represents a group of objects: Right-click your geodatabase in the Catalog pane. Select New > Feature Class to launch the wizard. Which (e