.anchor-point {
  width: 0;
  height: 0;
  font-size: 1rem;
  text-align: center;
}
.block-editor .anchor-point {
  width: auto;
  height: auto;
}
.block-editor .anchor-point::before {
  content: "Anchor points are only visible in the editor.";
  display: block;
  font-size: 0.75rem;
  color: #aaaaaa;
  text-align: center;
}