The Toolkit panel design aid should be viewed not as a substitute for IBM’s Screen Design Aid, but rather as a precursor. The Toolkit utilities allow you to take a much more sketchy approach. Design can initially be done in outline; detailed information need only be added once you have decided the basics. Since less effort is involved in preparing designs, you have greater freedom to try out different alternatives in search of the best; and above all, to precede top down. The Toolkit utilities allow you to design a display then break it up into formats, whereas SDA requires that you build up the panel from already decided formats.
The facilities in Toolkit for presenting system designs to the user are far more extensive than those present in SDA: this highlights the fact that the Toolkit design tools are intended to operate at an earlier stage in the design process than SDA.
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