Selecting a user to control a 3D holographic object of a plurality of 3D holographic objects projected in midair above a central point of a location by a projector when multiple users attempt to manipulate the same 3D holographic objects. Identification of the users and a policy regarding manipulation of the 3D holographic objects selected by more than one user are evaluated. For each of the 3D holographic objects selected by multiple users, a queue of interactions requested by the multiple users is generated during interactions of a single user with the 3D holographic object; and the interactions requested by the user with a highest priority of the multiple users are executed to manipulate the selected 3D holographic object.