An input device, such as a hand-held stylus, can be used to receive inputs and track motion of a user in three-dimensional space, for example during a drawings session. The tip sensor can detect contact with an object by receiving a force toward a body of the stylus. Inputs from the user can be applied to a tip sensor of the stylus via an adapter. The inputs provided via the adapter can be different from inputs applied by contact with an object. Accordingly, the stylus can interpret the user inputs to initiate, terminate, or modify characteristics of the drawing session.