This article will show you how to edit the Mega Menu Wrapper on your site.
Instructions
Navigate to Modules and on the Site Tools tab, select Design Center
Select the Theme Manager
Select the appropriate Layout and Theme
Click on the Fifth Style
Verify the Main Navigation drop-down says Mega Menu Wrapper
Make modifications to the Background & Border tab
Background Color: Modify the color of the background
Background Gradient: Edit the background gradient
Note: Background Gradients are supported by modern browsers, but in Internet Explorer 9 or below, they will display as a solid color that is an average of your start and stop colors.
Background Image: Upload a background image
Border: Set the style, width, and color of the border
Choose a saving option at the top:
If saving these changes to only the current theme, click Save Changes
If saving and pushing these changes to other themes, click the drop-down next to the Save Changes button and select Save and Push Changes to Other Themes
Choose the themes you want to push to
Select Save and Push Changes