We tried all kind of combinations.... modelEditor := (RubSmalltalkMethodEditorModel new client: self). widget := modelEditor newScrolledText. widget on: self text: #sourceCodeFrom: accept: #compileSource:notifying: readSelection: #contentsSelectionFrom: menu: #sourceCodeMenu:shifted:. self addDependent: modelEditor. self when: #sourceCodeFrom: send: #setText: to: modelEditor. widget beWrapped; beForSmalltalkCode; withLineNumbers; setText: self sourceCode; setTextSelector: #halt. ^ widget But we cannot get the editor or the widget to be invoked when the list changes. So we spent three hours on it so we should stop. We are missing just this bit. Stef