Thanks alain Before asking we read all the examples and I saw that selector: is used to communicate and update the code pane. (UIManager default newAutoAcceptTextEntryFor: self get: #selector set: #selector: class: String getEnabled: #haveClassName help: 'Enter a selector' translated entryCompletion: entryCompletion) acceptOnCR: false; ghostText: 'Selector'; withDropListButton; Now my problem (and may be there is not solution) is how can I connect from a pluggableListMorph to a RubScrollText when the list does not generate announcement. This is why I tried to pass via dependents or something like that. I will try to generate announcements but this is a lot more work and I do not know if it will work. Stef