A UDF (User Defined Field) is a feature of OpenDocMan that allows the administrator to add custom meta-data fields to all documents.

To Add UDF's:

====== Selection List Item ======

  - Click on Admin->UDF->Add
  - Enter the Internal Name (5 chars): ex. col2
  - Enter the Display Name: Color 2
  - Select "Select List"
  - Click "Add UDF"

Now that the UDF is added, the Select List UDF needs some values for the users to pick from:

  - Click on your new UDF in the admin menu (ex. "col2")
  - New Value: "Blue"
  - Click Update
  - New Value: "Red"
  - Click Update

Now "edit" or "add" a file and you should see a new dropdown list with Blue/Red as options for each file.

Radio items are done the same way as Select lists. 
The Text Field UDF just provides a blank text box for each file.