Link text messages to other objects.
Hierarchy
Text messages can be linked to objects above or below, in the Gamgi hierarchy. 
Pressing the button 
Below (the default), the 
Objects menu 
shows the only class of objects that can be owned by texts: Text itself. 
Pressing the button 
Above, the same menu shows the classes of 
objects that can own texts: Layer (the default), Assembly, Cell, Cluster, 
Molecule, Group, Plane, Direction, Atom, Orbital and Text. Texts can own 
other texts (they are recursive objects), so they can be linked above 
or below to other texts. 
Object
Gamgi expects users to identify first the text or list of texts
and then the object to link. When the 
Text entry is active
and empty, clicking the mouse over a text, on the current layer
(local selection), its identification is transported to the 
Text
entry. Gamgi is now expecting users to click on a object of the 
class currently selected in the 
Object menu. This object 
can be in a different layer or even in a different window (global 
selection). 
To select a visible object in a different layer, in the same window, 
just press the mouse over the object, as if it was in the current 
layer. To select objects without visual representation, 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. To select an object in a different 
window, with the mouse, use exactly the same procedure, in that 
window.
Link
Gamgi suppports only one type of linking mode for Text: 
Object.
The 
Object method links a text to a single 
Object. 
When the 
Hierarchy is 
Above, the text is unlinked from 
its current parent and linked to the object. When the 
Hierarchy 
is 
Below, the object is unlinked from its current parent and 
linked to the text. 
When the new child previously owned the new parent (a situation made 
possible because texts can own other texts), the new parent is first 
linked to the new child parent. 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.