document.addEventListener("keydown", e => {
  if (e.code == "KeyB") {
    e.preventDefault();
        e.stopPropagation();
        onPressB();
  }
});

function locateBEl() {
    //let el = document.querySelector(`[data-annotation-id="12120R"] a`)
    let styleMatch = "transform: matrix(3.37883, 0, 0, 3.37883, 0, 0); transform-origin: -189.673px -2.989px 0px; left: 189.673px; top: 2.989px; width: 36.136px; height: 8.966px;"
    let el = document.querySelector(`[class="linkAnnotation"][style="${styleMatch}"] a`);
    return el;
}

onPressB = () => {
    let el = locateBEl();
    el.click();
};