“…For instance, George et al [29] defined the user possibility to explore transitions between Milgram's RVC states without taking the headset off as seamless transition concept (SeaT), proposing a design space for further investigating of seamless, bi-directional transitions, that consists of four dimensions, such as (1) motivation for transition (social interaction and collaboration, physical integrity & orientation, awareness, and interaction with physical & virtual objects), ( 2) availability (user-triggered, system-triggered and continuous), ( 3) modality (visual, audio or haptic), and (4) the act of transitioning itself. By exploring to the same concept, Jetter et al [7] introduced Transitional Interfaces (TI) term, that enable users to move between different locations within the RVC; TIs allows users to choose the technology that best supports the task at hand and fulfills their information need. Finally, last year Wang et al [30] proposed a design space for single-user cross reality applications that consists of four dimensions: (1) transition and concurrent usage (a user transits from one point on the RVC to another, a user moves a visualization from one point on the RVC to another, a user interacts with multiple systems that belong to different points on the RVC concurrently), (2) output device, (3) input device (interacting with multiple systems along the RVC, interacting with one system along the RVC), and ( 4) interaction (transiting to another reality, moving a visualization across realities, selecting object across realities, and manipulating object across realities).…”