Sketcher > Getting Started in Sketcher > About Entering Sketcher
  
About Entering Sketcher
You can enter Sketcher mode using these methods:
Click File > New. Under Type, select Sketch.
Open or create a new part and then click Sketch.
With a part open, select a tool and then click Placement > Define. In the Sketch dialog box, set references and click Sketch.
You can also first select a sketch plane and then select a tool, bypassing the Sketch dialog box.