On the User-defined Variables page, you can create and edit auxiliary NetMan variables. The list shows all the NetMan environment variables that cannot be defined in any other section of the Settings program, and the values they contain:
Use the buttons at the top of this list to edit the list:
New. Generates a new variable.
Edit. Edits the selected item.
Delete. Deletes the selected item.
Delete all. Deletes all items from the list.