New Sketch
Start a new sketch and select a sketch plane.

- 
                Create a new sketch plane by defining a plane.
                
- 
                        Select one of the global planes.
                        

Figure 1. - 
                        If needed, use the Vector tool to modify the
                            plane's orientation.
                        

Figure 2. - 
                        Click 
 on the guide bar.
                     - 
                        Once the plane is accepted, the new sketch entity is added and you can
                            start sketching using the Create tools.
                        

Figure 3. 
 - 
                        Select one of the global planes.
                        
 - 
                Create a new sketch plane by selecting a face.
                
- Change the entity selector on the guide bar to Surface.
 - 
                        Select a surface to use as a reference plane.
                        
                            Figure 4.  - 
                        Click 
 on the guide bar.
                     - 
                        Once the plane is accepted, the new sketch entity is added and you can
                            start sketching using the Create tools.
                        

Figure 5. 
Tip:- For a surface selection, the cursor click location becomes an origin of the sketch plane.
 - At this origin, the plane normal is calculated and intersected with the part that the surface belongs to.