Displaying highlighting
You can improve overall program performance by turning highlighting off. When you select entities to modify, the program highlights them using a dashed linetype. This highlight disappears when you finish modifying the entities or when the entities are cleared. Sometimes highlighting entities can take a considerable amount of time.
To turn highlighting on and off
1 Do one of the following to choose Drawing Settings ():
On the ribbon, choose Application button > Drawing Utilities; Home > Drawing Settings (in Utilities); or Tools > Drawing Settings (in Manage).
On the menu, choose Tools > Drawing Settings.
On the Tools toolbar, click the Drawing Settings tool.
Type highlight, press Enter, and then in the prompt box, choose On or Off.
2 Click the Display tab.
3 Click the secondary Display tab.
4 Select or clear the Highlight Item When Selected check box.
5 Click OK.