OVERHEADS SET 2: DESIGN OF INTERACTIVE SYSTEMS

The 6 by 9 inch book format conforms to this exactly. The ratio of the text to the page area is also 2:3 so that for a 6 by 9 inch book the text is 4 by 6 inches. Text should be at least as deep as the sheet is wide. MARGINS IN TYPE. Margins used to facilitate scanning of and transfer between columns ................
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