The Cousin Window function is used to create an
additional editing window that is in a separate family group from the
current window. Opened data files are not shared amongst cousin windows.
Once a cousin window has been created, additional siblings may be added to its
family group. Creating two or more sets of cousin windows is similar in
functionality to launching an additional instance of OmniGlyph.
The Shift + Arrow keys may be used to transfer focus amongst
several cousin and sibling windows.