Comments Command (Mac) / Control (Win) -click on the path name in the Paths panel to convert the path to a selection.
To convert an additional path and add it to the selection, Command (Mac) / Control (Win) + Shift -click the secondary path name in the Paths panel.
To subtract a secondary path from a selection, Command + Option (Mac) / Control + Alt (Win) -click the secondary path name in the Paths panel.
To intersect a secondary path from a selection, Command + Option (Mac) / Control + Alt (Win) + Shift -click the secondary path name in the Paths panel.