I traced a shape in Corel draw, then saved it as DXF. After opening it in Draftsight, it opened as a spline.
I wanted to edit it by adding a 30 x 3 tab so I could fit it through a notch lasered through a piece of 3mm mdf. this meant trimming the spline and the 30 x 3 rectangle so the laser would follow the outline.
I am unable to trim the spline or explode it, all I can seem to do is shape it by dragging the tags.