Hi Pharo, I would like to design a spec UI for modifying a list of parameters. One line will be composed with the name of the parameter and one editable field. Should I use a MultipleColumnListModel or should I define a new widget of one line and after that composed multiple instance of this widget ? Thank you. -- Serge Stinckwich UCBN & UMI UMMISCO 209 (IRD/UPMC) Every DSL ends up being Smalltalk http://www.doesnotunderstand.org/