Validation level: 5. CHI, UIST, CSCW and TOCHI paper publication
A marking menu is designed to allow a user to perform a menu selection by either popping-up a radial (or pie) menu, or by making a straight mark in the direction of the desired menu item without popping-up the menu.
Copy Bibtex User Learning and Performance with Marking Menus. In Proceedings of the SIGCHI Conference on Human Factors in Computing Systems, pages 258-264, ACM, New York, NY, USA, CHI '94 , 1994.