This customization was originally developed by Jennifer Howard of Frontier Nursing University for their Frontier Digital Depot.
The default CONTENTdm responsive website has a main menu accessible via a “hamburger” icon in the upper right corner. Using a small number of custom CSS rules you can alter this menu so that it appears as a horizontal list of links across the header on larger screen sizes. This customization preserves the mobile-friendly “hamburger” menu for phone-sized screens. The basic CSS looks like this: