It's easy to use Scissor Tool. First choose contour, then connect the first and the last points. You can
change area with moving points in or out the selected area.After all press "Enter" - finishes manipulations
To use the Scissor Tool:
- Select the Free Lasso tool from the toolbar.
- Drag to draw a freehand selection border.
Hotkey for using this Tool is ALT + S. Hotkey for using this Tool is ALT + F.