Which option allows you to view and toggle additional features on the floor plan?

The correct choice, which is rigging, relates directly to the capability to view and toggle additional features on a floor plan in Cvent's diagramming tool. Rigging involves the overhead installation of equipment for events, such as lights, sound systems, and other visual elements. Being able to view these features on a floor plan enhances the planning and logistics of an event by providing clarity on how these installations will integrate with the overall setup.

By selecting the rigging option, users can activate specific visual indicators that show where rigging points are located, ensuring that all aspects of the event's audiovisual and technical requirements are addressed. This level of detail is crucial for effective venue setup, resource allocation, and ensuring safety compliance.

The other options, while relevant to venue setup, focus on different aspects. Electric outlets may indicate power sources, chair numbers are more related to seating arrangements, and events could refer to general event information rather than specific setup features. Hence, they would not provide the same comprehensive view or toggling ability related to the rigging elements on the floor plan.