Shared parameters are definitions of parameters that you can add to families or projects. Shared parameter definitions are stored in a .txt file independent of any family file or Revit project; this allows you to access the file from different families or projects. This file is referred to as the Shared Parameters file.
The Shared Parameters file can be stored in the Vault and activated from the Shared Parameters button on the Revit Vault ribbon.
Select a Shared Parameters File in a Vault
Open a project file and select Shared Parameters on the Revit Vault Ribbon.
The currently active Shared Parameters file is shown at the bottom left of the Select Shared Parameter File dialog.
Select the .txt Shared Parameters file that you want to activate and slick Select.
The latest version of the file is downloaded and set as the active Shared Parameters file.