Plot label settings provide default settings for plot label styles.
Global settings apply to plot label styles of every type; label-type settings apply only to plot label styles of a given type, such as area label styles.
Individual label styles inherit from label-type settings, which in turn inherit from global settings. You can override inherited settings at lower levels. Also, you can block overrides by locking settings at higher levels.
If a plot label setting is changed at a higher level, the change is propagated downward except where it is overridden. The change affects all styles that inherit it, and all labels in the drawing that use those styles.