One of the great triumphs of the regular font weight is its ability to manage optical illusions, and the tt digraph is a prime example. Consider two letters that are both vertically dominant. In a regular weight, the human eye will naturally perceive the space between them as being narrower than it mathematically is, due to a phenomenon called “positive space filling.” To compensate, a type designer adds extra side-bearing space specifically for the pair tt (a form of kerning). Without this, the word “battle” would look like “bat tle.”

With the rise of , which allows a single font (like Calibri or Roboto) to contain thousands of characters from every language and scientific field, you might wonder why Symbol TT Regular is still used. 1. Legacy Compatibility

: It includes a complete set of unaccented upper and lowercase Greek letters.

So, what makes Symbol TT Regular font so special? Here are some of its key features: