This item is always enabled. A dialog for the specification of a new scenario appears. The minimum set is to specify a scenario name for identification. The entered name is checked against the existing scenarios in the scenario database.
Optionally you can select a substance and a catchment from the related databases. The editing of a comment is also optional. Leaving the dialog with "Cancel" will abort the creation of a new scenario, "OK" will bring you to a dialog in which to specify a nonexisting directory for the new scenario. It will be created automatically.
The dialogs Model Selection and Edit Catchment Parameters then appear sequentially. Their invocation is necessary at this stage to complete the scenario data set.
Finally, the new scenario is made active. The previously active scenario is deactivated.
It is not possible to create a new scenario without a title nor to specify a title already used for another open scenario. If you have not selected a catchment the new scenario view will display a map of Europe.