How can I style the menu on scroll?

While we don’t currently have settings for styling the Mhmm menu on scroll, you can easily accomplish this with a bit of CSS. For example, to add a nice, subtle drop-shadow, just add the following to your stylesheet or to Divi > Theme Options > Custom CSS:

.mhmm-scrolled #mhmm {
    box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.5);
Or to change the background color on scroll, you’d do something like this:
.mhmm-scrolled #mhmm #et_pb_section_sticky {
    background-color: #F4002A;

/* Adds a slow fade from the original background color to the color you set on scroll */
#mhmm #et_pb_section_sticky {
    -o-transition: 0.5s;
    -ms-transition: 0.5s;
    -moz-transition: 0.5s;
    -webkit-transition: 0.5s;
    transition: 0.5s;