Systems and methods are provided for selectively controlling a carry mode for holograms presented in mixed-reality environments and for providing leashing buffers for the holograms. The carry mode enables holograms to be functionally moved within a single mixed-reality environment, and out into one or more different mixed-reality environments. The carry mode can be automatically applied to holograms created within the mixed-reality environment. The carry mode can also be applied responsive to user input applied to world-locked holograms, which triggers a switch from the world-locked mode to the carry mode from. Holograms can also be leashed for persistently displaying holograms associated with or linked to a user in the mixed-reality environment to provide the user increased accessibility to the hologram while navigating within and without a particular mixed-reality environment. Selectable options are presented with a hologram in carry mode for switching from the carry mode to the world-locked mode.