To access your campaign settings click on the chrome wheel icon (pictured in the screenshot below) to the top right of the campaign graph. This will open a drop-down menu for quick access to the four different sections of campaign settings.
The second way to access your campaign settings is to click the ". . ." button on the campaign graph and choose the first option labeled 'Settings'. This will take you to the 'General' section of the 'Campaign Settings'.