Creating the appearance of curves using square blocks requires an optical illusion. A number have been developed to achieve this. This is a method of rearranging pixels in order to create the best possible illusion of the letter's real shape. Different mathematical instructions are calculated to suit different type sizes. This method takes the illusion a step further by shading some pixels grey to improve the appearance of smoothness at the edges.
Every pixel is made up of red, green and blue light.
ClearType varies the intensity of each colour to blur a letter's jagged edges even more. The Stratford and Shaw Festivals Profiles and reviews by the Globe's Theatre Critic Kate Taylor. Crosswords Interactive and printable.