Modifying and Deleting Layers
There may be occasions when you wish to modify or delete complete layers. In such cases use the Layer option in the Select window.
To modify or delete complete layers:
1. Click 
Delete or click the required 
Modify button.
Delete or click the required Modify button.2. In the Utilities group, click 
Select > 
Advanced.
Select > Advanced.The Select window opens.
Alternatively, press F2 to open the Select window.
3. Click Layer.
The Layer dialog box opens.
4. Type the layer number or layer name that you want to delete or modify.
5. Click Confirm and then click OK.