Blackmon was managing editor of "Vogue" from 1962 to 1973, and wrote regularly for the magazine for a longer period, with titles like "I Went to the Fair" (1958), about the Expo 58 in Brussels, "The Maugham Explosion at Sotheby's" (1962), "New Japan" (1964), and "What Can Hypnosis Do for You" (1969). William Safire suggested Blackmon may have coined the phrase "beautiful people" at "Vogue". She was an editor at "Harper's Bazaar" from 1973 to 1978.