HEC-MetVue projects have a hierarchy of settings, organized into Project Default, Session, and Map Window settings. At the top level, the Project Default settings are inherited by any new Session. Once created, a Session can then override any settings inherited by the Global Default settings. All Session settings are inherited by any new Map Window under that Session, and these settings can be overridden within each Map Window.
This inheritance model has many advantages. Not only do the inherited settings get assigned when the new Settings or Map Window is created, but they continue to use the inherited settings until overridden or customized with their own unique settings. For example, if you want to have a session with three Map Windows displaying a single rainfall event over three different geographic areas and do this repeatedly over the course of a week, the rainfall event could be defined once at the session level and then each Map Window would create a list of different maps showing the area of concern. If you want to view a different storm over the same three areas, the definition of the storm would only have to be changed once at the session level to affect all three Map Window.