Sketch command allows you to create 2D geometries; Line, Rectangle, Circle, Arc and Spline. You can edit created 2D geometries using Trim, Chamfer, Resize and so on.

1.

Click  button in the Tool Palette, or click Insert > Sketch.

2.

The following dialog tree appears.

3.

Select Plane or Face.

4.

Now you are in the Sketch mode so you can create Line, Rectangle and so on.

5.

Edit 2D sketch using trim, fillet and so on.