Custom CSS File Editor
From the Admin panel, select Site Manager>Custom.css File Editor to make minor CSS file modifications.
You must be a SuperAdmin or an Admin with the Content Area role to access this feature.
The Editor
Custom CSS is edited in the Design Manager tool. You can see details on how to work with the tool in the Design Manager article.
For more detailed information on how CSS works, here is a link to the W3Schools CSS tutorial page: http://www.w3schools.com/css/
Changes made to this file will override existing site CSS and could cause your site to do unexpected things. Proceed with caution. Please contact Aldrich Web Solutions with any questions regarding your CSS file.