System and methods for defining and rendering a trajectory

Embodiments of systems and methods for defining and rendering a trajectory of an aircraft include a processing system that causes a three dimensional trajectory depiction to be rendered on a display device. The trajectory depiction includes at least one trajectory element indicator that corresponds to at least one trajectory element of a flight plan. The processing system also receives one or more user interface commands that indicate selection by a user of a selected trajectory element indicator and user-initiated movement of the selected trajectory element indicator from a first display position to a second display position. The processing system determines one or more modified characteristics of a trajectory element corresponding to the selected trajectory element indicator in response to the user-initiated movement, and causes a modified trajectory depiction to be rendered. The modified trajectory depiction includes the selected trajectory element indicator rendered at the second display position.