I tried to use toolbuilder to open tools like the changeSorter and I always got a rather small window. So I checked in Squeak and the buildPluggableWindow method is different Should we integrate this changes? http://code.google.com/p/pharo/issues/detail?id=1963 buildPluggableWindow: aSpec | widget children label | aSpec layout == #proportional ifFalse:[ "This needs to be implemented - probably by adding a single pane and then the rest" ^self error: 'Not implemented'. ]. widget := PluggableStandardWindow new. self register: widget id: aSpec name. widget model: aSpec model. (label := aSpec label) ifNotNil:[ label isSymbol ifTrue:[widget getLabelSelector: label] ifFalse:[widget setLabel: label]]. children := aSpec children. children isSymbol ifTrue:[ widget getChildrenSelector: children. widget update: children. children := #(). ]. widget closeWindowSelector: aSpec closeAction. panes := OrderedCollection new. self buildAll: children in: widget. - aSpec extent ifNotNil:[widget extent: aSpec extent]. + self buildHelpFor: widget spec: aSpec. + widget bounds: (RealEstateAgent + initialFrameFor: widget + initialExtent: (aSpec extent ifNil:[widget initialExtent]) + world: self currentWorld). widget setUpdatablePanesFrom: panes. ^widget A related question is do we get rid of the method creation that do not rely on toolbuilder? I think that it would make sense. Stef