About Contour Editor Modes
When you select the Contour Editor tool, its properties and options appear in the Tool Properties view.
Lasso and Marquee Modes
When selecting a section of a drawing, you can use the Lasso to make a freehand selection or the Marquee to make a rectangular selection.
In the tool properties, select Lasso 
or Marquee 
mode to change the selection style of the tool. Hold down the Alt key to temporarily switch from the selected mode to the other.
Snap to Contour Mode
The Snap to Contour option will snap the selected anchor point to any line you position it on.
The Snap to Contour option will snap the selected anchor point to any line you position it on.
How to snap two shapes together
- In the Tools toolbar, select the Contour Editor
tool.
- In the Contour Editor Tool Properties view, click the Snap to Contour
button.
- In the Stage view, click an anchor point you want to snap to the other shape, drag it on top of the contour line area and release it.
