The Quick Overview panel can be found in the left bottom corner of PCB-Investigator right below the Layer Stack Up panel. The Components (CMPs) tab shows an overview over all components of a board. Each component can be toggled open with a double click to get a list with all the pin and net names it is connected to. A double click on a pin-/net name highlights the selected pin/net in the visualisation. In addition to that you have the usual context menu (right click on concerning component/pin-/net name) options like directly jumping to a certain pin or net as well as assigning them specific colours.