In the Properties dialog the Thickness value for Text can be edited and the text will be extruded by the value entered. You can enter any positive or negative value and the text will be extruded to that value. It will also accept a value of zero.
The Thickness value for a Text Node can be edited and the text node will be extruded by the value entered, but the field will return to zero. You can enter any positive or negative value and the text node will be extruded to that value, but it will not accept a value of zero.
The behavior should be the same for both Text and Text Nodes.
