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The [[Interface#Add|Add]] button is located on the [[Interface#Bottom Bar|bottom bar]]. When clicked, the Add Tool menu will appear, displaying a list of objects that can be added to the simulation, sorted by [[Object Types|object type]], as well as four [[Add Tool#Settings|settings]]: Still, Orbit, Binary, and Launch.
Certain objects can also be added to the simulation with the Launch setting using the numbers 1-8 on the [[Keyboard Controls|keyboard]].
The Add settings determine the initial [[Velocity Vector|velocity]] that the new object will be given when it is added to the simulation.