With the function Create Central Elements Between Parallel Lines in the Tools menu, you can create elements together with their associated parts between parallel lines. Alternatively, use the
button in the CAD toolbar. The element thickness is automatically taken from the perpendicular distance between the two lines.
Select the lines one after the other in the work window by clicking the mouse. As soon as you move the mouse over the second line, you will see the element in the preview.
Material
You can select a material from the list of already created materials or also edit and define a new one.