twiddlable

Adjective

 * 1) Able to be twiddled.
 * 2) * 2015, 'rsidd', reply to FontForge and moving forward
 * [M]uch of Hofstadter's article was devoted to attacking Knuth's view that there is a "universality" to fonts such that a sufficient number of twiddlable knobs could cover all the font families around.