Rendering GUI widgets with generic look and feel by receiving in a display device a master definition of a graphics display, the master definition including at least one graphics definition element, the graphics definition element including a reference to a protowidget and one or more instance parameter values characterizing an instance of the protowidget, the protowidget includes a definition of a generic GUI object, including generic display values affecting overall look and feel of the graphics display, and rendering at least one instance of the protowidget to a graphics display in dependence upon the generic display values and the instance parameter values.