Selecting a single anatomical structure: To select an anatomical structure, tap it once. The structure turns blue and a breadcrumb trail appears at the top of the screen, displaying hierarchical information about the structure, including its name (highlighted as the last term to the right). A second selection overrides the first selection (unless in Multiple Select mode; see below), so that only one structure at a time appears in blue. To deselect a selected structure, tap on it once.
Selecting multiple anatomical structures: To select multiple anatomical structures, select the first structure you want to select, and then tap the "Multiple Select" button under the joystick. The indicator at the top of the screen changes to "Multiple Select On." Alternatively, you can tap on the "Multiple Select" button in the Actions menu. The Multiple Select mode allows you to select as many structures as you wish by tapping each structure once. All remain blue, but only the most recently selected structure selected is displayed in the breadcrumb trail at the top of the screen. To deselect any selected structure, tap on it once.
Selecting an anatomical grouping: When any anatomical structure is selected, a breadcrumb trail appears at the top of the screen displaying hierarchical information about the structure, including that structure's system. You can select larger groupings within the respiratory system by tapping once on the desired name in the breadcrumb trail. The associated anatomical structures are added to the model if necessary, selected and displayed in blue. For non-respiratory system structures, larger groupings are named in the breadcrumb trail for study purposes but are not displayed in the model.
Deselecting structures: If Multiple Select mode is on, deselect a single structure by tapping on it again, or deselect all structures by tapping the "Deselect All" button under the joystick or in the Actions menu. If Single Select mode is on, tap on a white area of the screen to deselect a single structure, or tap on the selected structure itself.