Paul's method will work fine.
your root subform should be Position. then add a Flow subform on top of that. In the Flow subform, add you text elements.
In mine, I have 1 Position subform, then 1 Flow subform. Within the Flow subform, I have a Text Field (as a header), a Text Input field, another Text Field (as a header), and a final Text input field.
If too much text is entered in either input fields, they will expand to show all the text.