The Workspace menu includes functionalities that help to manage the Workspace window and its content. Apart from that some options to arrange the windows displayed by Demetra+ are also available. The description of these functionalities is presented on the slideshow.
One of the possible ways to create new specification is to choose the Tramo-Seats specifications... or X12 specifications... from the Seasonal adjustment menu. Learn more about these functions here (TRAMO/SEATS specification) or here (X-12-ARIMA specification).
The Seasonal adjustment menu also offers two options (New and Wizard) to create the processing for single time series. Click here to study it step by step.