The next place that information can be displayed is in the connectors. There are three types of connector as follows.
Here is a chart that uses some of these connectors.
The relative major-minor relationship (Am-F in this case) is important as these two chords have a close connection musically and often follow eachother during a chord progression. By using the connector to show this, we can instantly see that the “jump” from one chord to its relative is not unexpected. For more see relative majors and minors.
The above example also shows a cadence in the middle of a phrase (from the B7-E). Generally speaking, any progression that contains a dominant 7th chord that then falls a fifth as in the above example, will be represented with a cadence connector.