RotoPaint - Nuke 101: Professional Compositing and Visual Effects - page 273

12. Drag a soft edge from the points on the right side of the shape to smooth that part
of the transition by holding down Ctrl/Cmd and dragging ( FIGURE 6.42 ).
Figure 6.42. Make sure the elbow stays outside the shape when pulling a soft
edge.
YounowneedtocreateanotherBézierforthepartofthepersonontheleftscreen
that overlaps the person on the right screen. You'll use another shape in the same
node.
13. Select the fg.png Read node and press the 1 key to view it.