Located near the top of the interface is the Top Bar, this panel includes the functions needed to select every type of components from your UV Map (vertices, edges, polygons & islands) for manipulation with the UV gizmo.

This panel also displays which UV Tool you are currently using, which type of default texture you wish to show mapped onto your Unwrapped Retopo Object (simple checker, etc.) as well as a drop-down menu that shows a list of UV Maps that you have.
It will display all UV Maps whether they were created in another application and imported with the mesh, or created within 3DCoat.
These options are:

The UV Map drop-down list also has functions to Add, Delete and Rename UV Maps (UV Tiles).

Move Selected is a drop-down list with all the existing UV Maps, that will let you move selected components to another UV Map by selected that map in the drop-down.

Vertices, Edges, Faces, Islands, Brush, Tweak

Select
Manipulate

Simple Checker
Segments Count:
Preview Islands
uvUnwrapByCoordinates:

There are only two menu functions, tucked away into the Textures Menu, that relate to the UV Room.
They are Import/Export UV, which allow you to import/export the mesh with the current in-progress UV editing from the UV Room to/from disk.

Multiple UV Sets: This video demonstrates the usage of multiple UV sets in 3DCoat, and briefly touches on the new UV tile support.