"This is the main window of the application where you can open the sample files or create new ones."

"You will be able to insert submodels, knots and ports within your projects, according to your needs."

"20sim Viewer offers you the possibility to adjust the parameters and the initial values for every model."

"The Drawing menu will allow you to bring objects to front, group them, rotate or mirror them."

"The Model Properties window is the place where you can specify a name for your model and choose the library file."