Hi While harvesting the old change of Henrik on margins and the idea that Rectangle should not be used to express margins. I looked at expandBy: comment In fact I would like to make sure that that no rectangle is passed as argument and that we can deprecate asMargin from the Rectangle class (we can keep it but I would like to identify the callers). expandBy: delta "Answer a Rectangle that is outset from the receiver by delta. delta is a Rectangle, Point, or scalar." ^ delta asMargin expandRectangle: self So looked at all the senders of expandBy: and they look ok. I imagine that I should do the same for extendBy: Stef