Cutting edges can be added subsequently to permit the creation of non-rectangular purlin courses as well.

• Number – Displays the number of borderline sections added with cutting lines.
• Cut width – Sets the thickness of the cutting line.
• Add cutting line – This tool adds a cutting edge. When clicked, the focus shifts in the view and prompts for a borderline to be clicked or to be defined by 2 points. All purlins intersecting this edge are divided at the edge with the distance specified in the Cut width field.
• Remove cutting line – This tool removes a selected cutting edge.

Apart from cutting edges, it is also possible to add sections for light domes or similar things. The procedure is the same as for sections; the only difference is that you have to click on a poly-line here.

• Number – Displays the number of cut-out sections added.
• Add cut-out – This tool adds a cut-out. When clicked, the focus shifts in the view and you can select a smart line to add a section.
• Remove cut-out – This tool removes a selected cut-out section.