| Step 1. | Choose Home tab→Sketch group→Sketch. 
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| Step 2. | Select an assembly reference plane, part face, or part reference plane. Note: A sketch view is displayed, oriented to the reference plane or face you selected. Sketch commands are displayed. Note: Assembly sketch geometry can be associatively linked to drive the creation of ordered part geometry only. | 
| Step 3. | Use the sketch commands to draw the assembly sketch elements you want. | 
| Step 4. | Choose Home tab→Close group→Close Sketch. |