Use the subway creator to make your subway – you don't need a spreadsheet.
Go to Common Options for Charts and Graphs to see the rest of the options
Label: create a text label for the station, such as "Grand Central Station," which will appear next to the station on the map
Link: add a link that will open when a user clicks on the station's label
Label Position: position the label relative to the station: top, left, right, or bottom
Station type: choose the visual appearance of the station