Locking a story clip prevents animators from accidentally moving or retiming a clip, and avoids subsequent issues that can arise later in the animation pipeline. You cannot move, scale, stretch, or otherwise modify a locked story clip. 
	 
To lock a clip
- Select a clip in the 
		  Story window. 
		
 
- In the 
		  Properties tab of the 
		  Resources window, turn on 
		  In/Out Locked. 
		  
 
		  
 
		  The clip is locked and the following updates occur: 
		  
- The title of the clip in the 
				Story window updates to show it is locked: 
				
 
				
 
			  
- The 
				In and 
				Out parameters of the clip are locked and can not be modified: