Editing Tube map (section)

===Station marks===
From the start, interchange stations were given a special mark to indicate their importance, but its shape has changed over the years. In addition, since 1960, marks were used to identify stations that offered connections with [[British Rail]] (now [[National Rail]]). The following shapes have been used:
* Circle (one for each line or station, where convenient)&nbsp;– standard default mark
* Circle (one for each station)&nbsp;– 1938 experimental map
* Diamond (one for each line)&nbsp;– early 1930s
* Square&nbsp;– interchange with British Railways, 1960–1964
* Circle with a dot inside&nbsp;– interchange with British Rail, 1964–1970

Since 1970 the map has used a reversed (red on white) British Rail "double arrow" beside the station name to indicate main line interchanges. Where the main line station has a different name from the Underground station that it connects with, since 1977 this has been shown in a box. The distance between the Tube station and the main line station is now shown.

Contemporary maps have marked stations offering step-free access with a blue circle containing a wheelchair symbol in white.

Stations with links to airports ([[Heathrow Terminals 2 & 3 tube station|Heathrow Terminals 2 & 3]], [[Heathrow Terminal 4 tube station|Terminal 4]], and [[Heathrow Terminal 5 station|Terminal 5]] for [[Heathrow Airport]] and the [[London City Airport DLR station|DLR station at City Airport]]) are shown with a black aeroplane symbol.

Since 2000, stations with a nearby interchange to river bus piers on the Thames have been marked with a small boat symbol to promote [[London River Services]].

When [[Eurostar]] services used {{Stnlnk|Waterloo International}}, the Eurostar logo was shown next to [[London Waterloo station|Waterloo station]]. In November 2007, the terminus was transferred to [[St Pancras railway station|St Pancras International]].