Create Stash (Stash it/them)
Stashes can be thought of as backups of objects. These backups can then be brought back at any time, or referenced/used by other tools, such as Conform or Normal Transfer. Stash objects do not clutter your scene, because they don't exist in any scene. They are only stored in the blend file itself.
The Create Stash tool is used to create a stash, either from the currently active object, or if multiple objects are selected, to the active object.
The Create Stash tool appears as Stash it or Stash them in the menu.
One or multiple objects can be selected, one has to be active.
You can stash in object and edit mode.