When you switch back to the assembly window after editing a component in a separate window, a message asks if you want to rebuild now. 
			Select Yes or No. Optionally, select Don't show again.
		
| Yes | Rebuilds the assembly to incorporate the changes you made to the component. | 
| No | Skips the rebuild of  the assembly. When a rebuild is skipped, a yellow warning triangle appears on Rebuild      (Standard toolbar), and a tooltip states Assembly not up to date. | 
| Don't show again | Suppresses the message. In the future, when you switch back to the assembly window after editing a component in a separate window, the message does not appear and the selection you make now (Yes or No) is applied. In effect, you can  specify: 
| Always Rebuild | Select Yes and Don't show again. |  
| Never Rebuild | Select No and Don't show again. | 
To restore a suppressed message, click , and under Dismissed messages, select the message you want to restore. |