Select all the surfaces needed to create a boss, pocket, or side feature. 
- To select all the surfaces of a boss feature, click 
	 Home tab > 
	 Select & Edit panel > 
	 Select > 
	 Select Boss, then click a single surface of a boss. 
  
 
- To select all the surfaces of a pocket feature, click 
	 Home tab > 
	 Select & Edit panel > 
	 Select > 
	 Select Pocket, then click a single surface of a pocket. 
  
 
- To select all the surfaces of a side feature, click 
	 Home tab > 
	 Select & Edit panel > 
	 Select > 
	 Select Side, then click a single surface of a side. 
  
 
When you have selected all the surfaces, use 
  Features & Manufacturing tab > 
  Features panel > 
  Mill from Surface to create the boss, pocket, or side feature.