Overview
Use a single-choice parameter when exactly one alternative should apply. The screenshot’s Dimension Style and Grid source use this pattern, with Revit default and Host selected. The inspected control is a searchable dropdown with a circular single-choice icon. It provides the same choose-one decision as a radio group, but an exposed row of radio buttons is not established by this source.In Ideatura
- Open the selector.
- Search or inspect its available options.
- Choose one value.
- Check whether the field is required and whether it can be cleared.