Choose the layer in the Layer dropdown; the first layer is selected by default. Each row is an event, its columns are the event's measurements, and the Event Label column identifies it.
For the current sample or region, Raw Data is a tab in the right-hand dock. The global Raw Data, from Project › Raw Data, covers all samples and regions and is mainly for batch export.
Right-click a column head to sort and filter. Double-click a row to highlight that event in the Image Viewer and in the diagrams.