Testing Tool for Font Adaptation

This tool measures the effects of changing font family, letter spacing,
word spacing and font size.

http://nosetothepage.org/fontStats/FDSDoc.html

Faults:
1. it is slow. I need to add a fast search.
2. It may not handle some traditional CJK fonts
3. It is clumsy. Your must refresh the page to rerun, but it will remember
your settings.

Here is some sample output. it compares Tahoma with modified spacing to
normal Verdana.

Font Data AnalysisUser Font Settings

Test String in "Tahoma" is One of Ada's friends suggested that she produce
a translation of Menabrea's piece for Scientific Memoirs, a periodical
devoted to scientific papers. This was her opportunity to serve Babbage and
show her talents. When she finished, she informed Babbage, who was pleased
but also somewhat surprised. "I asked why she had not herself written an
original paper on a subject with which she was so intimately acquainted,"
Babbage said. 34 She replied that the thought had not occurred to her. Back
then, women generally did not publish scientific papers.
Comparison Font Settings

Test String in "Verdana" is One of Ada's friends suggested that she produce
a translation of Menabrea's piece for Scientific Memoirs, a periodical
devoted to scientific papers. This was her opportunity to serve Babbage and
show her talents. When she finished, she informed Babbage, who was pleased
but also somewhat surprised. "I asked why she had not herself written an
original paper on a subject with which she was so intimately acquainted,"
Babbage said. 34 She replied that the thought had not occurred to her. Back
then, women generally did not publish scientific papers.
Font FamilyFont SizeLetter SpacingWord SpacingSet WidthAve Char Width
Tahoma 16px 0.07em 0.1em 4683px 8.499px
Verdana 16px 0em 0em 4483px 8.136px

The width ratio Tahoma / Verdana = *1.045*