The Administration|Types screen is a select screen that allows you to select the specific Type to be viewed or maintained. Below is the screen as initially displayed but with the Types pull-down list showing.

Note that if you do edit Administration|Types items (say to change an an appointment type colour), then the new values will not become available until the next time you log on (because these type settings are fetched once at logon time to improve performance).

Each Type has its own view/edit screen.