If you plan to use a
style more than once, you can save it in the Display Library.
Once a style is saved
in the library, you can drag it to a drawing layer.
you drag a style from the Display Library to
a drawing layer, the style is referenced. If you copy and paste
the style, a new style is created.
When you drag a style
from the library, you can reference the library style. When a style
references a library style, any changes to the style in one location
are automatically reflected in the other location.
have a layer look the same at all scale thresholds, store the style
in the Display Library. Then, at every
scale threshold, reference the Display Library style.
This way, you can automatically modify the style at every scale
threshold by updating the style in the Display Library.