Abstract: A computer system displays a first object that includes at least a first portion of the first object and a second portion of the first object and detects a first gaze input that meets first criteria, wherein the first criteria require that the first gaze input is directed to the first portion of the first object in order for the first criteria to be met. In response, the computer system displays a first control element that corresponds to a first operation associated with the first object, wherein the first control element was not displayed prior to detecting that the first gaze input met the first criteria, and detects a first user input directed to the first control element. In response to detecting the first user input directed to the first control element, the computer system performs the first operation with respect to the first object.

Abstract: A computer system displays a first user interface object and a first control element with a first appearance that is associated with performing a first operation with respect to the first user interface object, in a first view of a three-dimensional environment. The computer system detects a first gaze input that is directed to the first control element, and in response, updates an appearance of the first control element from to a second appearance that is different from the first appearance. While displaying the first control element with the second appearance, the computer system detects a first user input directed to the first control element, and in accordance with a determination that the first user input meets first criteria, updates the appearance of the first control element from the second appearance to a third appearance that is different from the first appearance and the second appearance.

Abstract: A method and a system of assembling a launch vehicle vertically on an aboveground platform are presented in the present invention. The method of the present invention enables a rapid assembly of the launch vehicle; thus substantially reducing the final cost of the launch vehicle. The system of the present invention includes a plurality of specially designed tools that enable the rapid assembly of the launch vehicle.