How do I change the line on a cut out?

Open the Takeoff on the Quote tab and press Select in the tools row.
Press the cut out on the drawing. Its corner dots show and it is picked.
Press the line weight to make its edge thicker or thinner, and the line style to pick Solid, Dashed or Dotted. On a phone, both are in "...".
Press anywhere off the shape to let it go. The presses then style the layer again.

Worth knowing

A cut out has no colour or fill of its own: it takes the layer colour and shows the paper through it. A cut out with no style of its own is dashed. Fill a room was removed, as it did not follow walls closely enough: draw a room with Area, corner by corner.