but these tabs contain a series of check boxes. With this window the user may turn on or off a section for all operations of that type.
When the user turns a section on through this editor, other sections might turn on automatically. This section contains some operating rules that understand some sections to be prerequisite to running other sections. These operating rules are based on BASINS Technical Note 3: the NPSM/HSPF Simulation Module Matrix. Following these operating rules, all required and recommended prerequisite sections are turned on.
Then the user may click OK to exit and save the changes or Cancel to exit without saving the changes.
When making sections active, often tables that are not yet present become required by HSPF. If the user has turned some sections on and clicked OK, this editor will give the user the option to automatically add the tables required by the active sections.