Updates: Status: Accepted Labels: -Priority-Medium Priority-High Comment #4 on issue 446 by tudor.gi...(a)gmail.com: uml class shape aligned the rectangles http://code.google.com/p/moose-technology/issues/detail?id=446 A form of the problem is still around. This is an important issue that prevents us from actually using the FormsBuilder. Here is an example with a ChildrenShape inside. The green shape on top should have a constant minimum size. Instead its height increases together with the height of the children shape below: | builder | builder := MOFormsBuilder new. builder column; fill. builder row; fill; row; fill. builder x: 1 y: 1 add: (MORectangleShape new width: 30; fillColor: Color green). builder x: 1 y: 2 add: (MORectangleShape new). builder x: 1 y: 2 add: (MOChildrenShape new). view shape: builder shape. view nodes: (1 to: 5) forEach: [:each | view nodes: (1 to: each). view verticalLineLayout ]