The Selection section of the tab allows for the selection of areas and locations within the mapping interface. The Select Points option allows for single click selection of locations.
The Polygon Selection allows for the drawing of a shape to select locations on the map. Just select the first vertex for the shape, then select each following vertices followed by a Double-click to end the shape selection.
The Rectangle Selection allows for the drawing of a rectangle to select locations on the map. Just click on the map then drag the rectangle over the locations that you wish to select.
The Clear Selection option will remove the selection of any location or area data within the mapping interface.