If we are going to track the Moon, we will need to point the display at it first. The lookToward function is used to do this. Highlight this function in the Function Browser, and note the documentation displayed in the panel below the Browser. Press the Add Function button to add this function to the Current Script box. The Function Arguments panel will now contain a combobox labeled dir, short for direction. This is the direction in which the display should be pointed. The combobox contains only the cardinal compass points, not the Moon or any other objects. You can either enter Moon in the box manually, or press the Object button to use the Find Object window to select the Moon from the list of named objects. Note that, as usual, centering on an object automatically engages object-tracking mode, so there is no need to add the setTracking function after lookToward.
Se imos seguir a Lúa, temos primeiros que centrar o visor nela. A función lookToward é a que se emprega para isto. Resalta esta función no Navegador de funcións e observa a documentación que se mostra no panel que hai por debaixo do Navegador.