When you use a style
from the library, the style in the layer references the
style in the Display Library.
Example: The Display
Library has a style called "Pipes" that colors drawing objects
blue. Reference this style from any pipe layer.
If a style references
a library style, any changes to the style in one location are automatically
reflected in any other locations where the style is used. That is,
if you modify the style in the Display Manager,
the style in the Display Libraryis automatically
updated, as are any other styles that reference the style in the Display
If you turn off referencing
for a style, any additional changes you make to that style do not
affect the other locations.
you turn off referencing for a style, you cannot turn it back on.