To Fill In Empty Text Node(s)

Select the Place Text tool.
The Text Editor window opens if it is not already open.
Set Method to By Origin.
In the Text Editor window, type the text.
Select the empty text node(s).
The text assumes the attributes of the text node unless text attributes are explicitly changed prior to placing the text into the empty node.
Do one of the following:

Return to step 4 to select another empty text node.

or
Return to step 3 to place other text.

Note: If you enter just one line of text in a text node, it becomes a text element.