To Adjust Level Properties

In the Level Manager dialog Level list, select the desired level.
Do one of the following:

Right-click the level in the list and choose Properties from the pop-up menu.

or
From the dialog's Levels menu, choose Properties.

The Level Properties dialog opens. The General tab displays basic file information and symbology information (both ByLevel and Overrides). The Styles tab displays Custom Line Style information (both ByLevel and Overrides).
Click OK.