Primary Window
When Vulcan starts, it creates the Primary Window from the mapping specifications from your project specification file. You can use the name section of this file to give this coordinate system a name, otherwise the name of the file is used. Unlike subsequent windows opened with the View > Windows > Open option you cannot delete this window. You can, however, hide it using the cross in the right hand top corner of the window.
If you change the coordinate system inside this window (using, for example, the View > Windows > Select option) its title changes to reflect the new system and an '*' is appended to indicate that this window is still the Primary Window. The Primary Window cannot be deleted and it is the window that responds to the View > Windows > Select option. Also, it has it's own menu bar if you float it into its own window.