Adding an attribute to a document type in SharePoint

To add an attribute to a document type in SharePoint:

  1. Open the SharePoint client.
  2. Open the document library (document type) to which to add the attribute.
  3. Select Library Settings.
  4. Click Create column.
  5. Give the column a name.
  6. Select the type.
  7. Depending of the selected type, set the constraints.
  8. Click OK.