# Special Space Name Symbols

Each user space that you create has a unique name; you specify the name of the space when you create the user space. In addition to user names, the following special space names are defined by VisionPro:

Symbol | Description
--- | ---
@ | Root space.
# | Pixel space.
* | Display pixel space. You can use this special name only when specifying the space name for graphics.
^ | Alias for the root space.
. | Current SelectedSpaceName for an image. You can use this special name only with methods implemented by the CogImage object; there is no "selected space" for a CogCoordinateSpaceTree.
.. | Parent space name of the current selected space.
$ | The child coordinate space created by a parent space for its children. The VisionPro graphics system uses "$" to allow multigenerational hierarchies of shapes. You can obtain this space using a graphic's GetParentFromChildTransform method.