From the 1920s Morison became an influential adviser to the British Monotype Corporation, advising them on type design. His strong aesthetic sense was a force within the company, which starting shortly before his joining became increasingly known for commissioning popular, historically influenced designs that revived some of the best typefaces of the past, with particular attention to the middle period of printing from the Renaissance to the late eighteenth-century, and creating and licensing several new type designs that would become popular. Original typefaces commissioned under Morison's involvement included Times New Roman, Gill Sans and Perpetua, while revivals of older designs included Bembo, Ehrhardt and Bell. Times New Roman, the development of which Morison led to the point that he felt he could consider it his own design, has become one of the most used typefaces of all time. Becoming closely connected to "The Times" newspaper as an advisor on printing, he became part of its management and the editor of the "Times Literary Supplement" after the war, and late in life joined the editorial board of "Encyclopædia Britannica".