- A gridded page is much like scaffolding for a building.
- The Van De Graff canon is a historical reconstruction of a method that may have been used in book design to divide a page in pleasing proportions.
- Essentially used to divide a page
- Also known as a secret canon
- Works for any page width:height ratio
- Created symmetrical & asymmetrical layouts



Using Van De Graff Canon & rule of 9ths on my proportioned page with rough measurements and markers.
LEADING
- Column width is more than just design or format
- Also based on legibility
- According to empirical rule there should be 7 words per line for text of any length
- Text is read by the eye of a distance of 30-35 cm.
- To keep the type areas light & open we must consider the leading.
- Is the vertical from line to line which suits the size of the type.
- Overlong text lines tire the eyes, as do over-short ones.
- Readers find overlong lines strenuous to read.
- Too short of a line and your eye changes text lines too often.
- The key is ease of reading.
- Text must not impair the rhythm of reading.
- This can not apply to titles & subtitles.



MARGIN PROPORTIONS
- Margins can have influence on the overall feel of a page of print.
- Too small - looks overfull.
- Too large - Exaggeration.
- Well balanced margins on the sides, head & tail can create an agreeable impression.



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