document error

a!formLayout(
  label: "View Document",
  contents: {
    a!sectionLayout(
      contents: {
        a!documentViewerField(
          label: "Document Viewer",
          labelPosition: "ABOVE",
          document: 5080,
          height: "MEDIUM"
        )
      }
    )
  },
  buttons: a!buttonLayout(
    primaryButtons: {
      a!buttonWidget(
        label: "Submit",
        submit: true,
        value: "Submit",
        saveInto: ri!buttonvalue,
        style: "PRIMARY",
        loadingIndicator: true
      )
    },
    secondaryButtons: {
      a!buttonWidget(
        label: "Back",
        submit: true,
        value: "Back",
        saveInto: ri!buttonvalue,
        style: "NORMAL",
        validate: false
      )
    }
  )
)

I want to see the document  in the interface with the help of this code but  I am not able to do this.

Its directly download the document how can I see the document ?