This is an idea for a better html editor:

• Expose the box model to the html programmer by visually showing the boxes that elements are contained within
• allow changing of padding, margin and border properties directly instead of through property sheets
• automatically calculate the minimal set of properties required to specify the box model built by the user. Eg, if a child and its parent element have the same property, bubble the property up an dinherit it.
•  Allow abilty to specify “global” overflow and containment of elements directly instead of through interacting css properties.
• Allow views of the model with no content, some content and  a lot of content directly, so that the model can be stress tested.
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