You can change the value of a document property in the Document Information dialog box or in the SolidWorks Explorer client.
If SolidWorks Workgroup PDM is added in, you must be the owner to change properties of a vaulted document. Also, the vault administrator must have enabled changing document properties on the Vault Settings tab of VaultAdmin. The vault administrator defines document properties for all projects in the vault on the Properties tab of VaultAdmin.