You can create a start and an end from the Toolbox, Browser, or Model menu.
Use the Start or End tool in the Toolbox.
Select Model > Starts or Model > Ends, and click the Add a Row tool.
Right-click the model (or a package) in the Browser, and select New > Start or New > End.
For general information about creating objects, see Core Features Guide > Modeling with PowerDesigner > Objects.