.item-wrapper-richtextcontent label[for^="id_richtext"]::before {
    content: "Make sure you add alt-text to any images.";
    display: block;
}

.item-wrapper-columnsstart > h2::after {
  content: "Remember to add a columns end section.";
  font-weight: bold;
  font-size: 14px;
  padding-left: 10px;
}
.item-wrapper-columnsstart > h2 {
    background-color: blueviolet;
  }
.item-wrapper-columnsend > h2 {
    background-color: orange;
    color: black;
}
.item-wrapper-columncontent > h2 {
  background-color: deepskyblue;
}
.item-wrapper-columnsend > h2::after {
  content: "Must correspond to a columns start section above.";
  font-size: 14px;
  padding-left: 10px;
  font-weight: bold;
}