To simulate mouse events the buttons below use the Robot class that is defined in Robot.js.

Click these buttons in order from top to bottom:
Drag From Palette
Copy Node
Drag Select Nodes
Context Menu Click Alpha
Delete

Clicking operations:
Click Lambda
Double Click Lambda

The UndoManager has been enabled in the main Diagram. Give focus to the Diagram and you can undo everything and then redo everything to confirm what was executed by the Robot.