Description of gantt_chart_add_second_layer

This image shows a Gantt chart visualization called Project Schedule with two layers of horizontal bars. The Grammar pane shows the Primary Range section using the columns Action Start and Actual End for Start Time and End Time as well as the Secondary Range section using the columns Planned Start and Planned End for Start Time and End Time. The thicker bars in the visualization represent the Primary Range and the thinner bars represent the Secondary Range.