The element, NewLine works with the flow area, and sets the position of the following elements to be just below the elements, that have just been placed. It will adapt the line distance to the size of the elements, unless you have specified a specific line height in the flow area. If you e.g. change the font size for some texts, then this element will increase the line height.

An example where the NewLine element is used can be found here.

The NewLine element has no effect inside a fixed area.