Link an orbital or a list of orbitals to other objects.
Hierarchy
Orbitals can be linked to objects above or below, in the Gamgi hierarchy. 
Pressing the button 
Below (the default), the class menu 
shows the classes of objects that can be owned by orbitals. Pressing
the button 
Above, the same menu shows the classes
of objects that can own orbitals.
Gamgi expects users to identify first the orbital or list of orbitals
and then the object to link. When the 
Orbital entry is active 
and empty, clicking the mouse over an orbital, on the current layer
(local selection), its identification is transported to the 
Orbital 
entry. Pressing the 
List button, the current list of orbitals
is selected instead.
Gamgi is now expecting users to click on a object of the class 
currently selected in the class menu. This object can be in 
a different layer or window (global selection). 
To select a visible object, just press the mouse over the object,
in its window. To select objects without visual representation, such
as layers and lights, press the mouse over the graphic area in the window,
to create a menu with all the objects of that class in the window,
which can then be selected.
Method
Gamgi suppports only one method to link orbitals: 
Object.
The 
Object method links an orbital or a list of orbitals
to a single object, 
Above or 
Below.
When linking an orbital and the 
Hierarchy is 
Above, the orbital
is unlinked from its current parent and linked to the new object. 
When the 
Hierarchy is 
Below, the child object is unlinked
from its current parent and linked to the orbital. An error
is issued when the parent already owned the child object.
After the linking operation, Gamgi always puts on top
the window and layer containing the linked objects.
When linking a list of orbitals 
Above, all orbitals in the list
are unlinked and linked to the parent object. When linking a list
of orbitals 
Below, the child object is replicated as many times
as necessary to link each orbital in the list to a different replica.