The work that Dr John Gill has done on improving legibility on screen systems has prompted enquiries from organisations wanting to ensure that legibility is improved in other areas such as signs in buildings and public spaces.

Tiresias Signfont is a development of the Tiresias family that has been specially designed for use on signs. Tiresias Signfont has a different level of boldness than Screenfont and PCfont, and has more open spacing than conventional type. Signfont is designed to provide maximum readability at longer distances.