Resizing banner in Mojave to stay a full width image for mobile

Edit above page settings > Advanced > Header

<style>
  @media screen and (max-width:640px) {
  .Parallax-item:first-child img {
    width: 100% !important;
    height: auto !important;
    left: 0 !important;
    top: 0 !important;
}
    .Parallax-item:first-child figure {
    transform: unset !important;
}
    section#new-page-54 {
    min-height: unset !important;
    height: 250px;
}
  }
</style>

Thank you! It doesn't seem to keep it's parallax qualities. Is that to be expected?

Yes. above code will disable Parallax on mobile.

To keep Parallax, try remove this line

Quote

.Parallax-item:first-child figure {
    transform: unset !important;
}