In Part 2 we look at groups of characters - consonants, vowels and tone marks - with visually similar characteristics, and identify what sets characters apart. This part presents an alternative view of how characters are both related and visually distinct.
Rojarayont (2001) devised what he called a "Table of Thai Character Relationships". This table organises the Thai characters so that characters which share similar characteristics (for example, when one character is a variant of another) are placed next to each other, either vertically or horizontally. So, for example, บ is next to ป, and ร is next to ธ.
The following tables show the Table of Thai Character Relationships in a standard font (Font 1), and four modern fonts (Fonts 2-5). Studying them reading both horizontally and vertically to see how characters differ from each other - particularly when those differences are minimal.