Abstract: Aspects of the present disclosure are directed to establishing a shared anchor object and common coordinate system amongst multiple extended reality (XR) systems accessing a multiuser XR environment. Virtual objects (including avatars of users accessing the multiuser XR environment via respective XR systems) can be consistently mapped in the XR environment relative to the anchor object. The anchor object can be a virtual object, such as a menu or shape (e.g., a ring), or a physical object, such as a stage computing device positioned in the users' surrounding real-world environments. The users can move the anchor object as rendered on their respective XR systems, which can cause reciprocal movement of their corresponding avatars on other users' XR systems. The users can further move virtual objects relative to the anchor object, which can cause similar movement relative to the anchor object in the XR environment as rendered on the accessing XR systems.