an open source PCB editor for Microsoft Windows, released under the GNU General Public License.

Select contour

To copy a copper area, select its entire outline. When the side of the copper area is highlighted, press F5 Select Contours. If the highlighted side is part of the cutout, the cutout will be highlighted. If the selected side is part of the main contour of the copper area , then the entire copper area will be selected as a whole.