title: Is it possible to use custom markers?
body: <p>Is it possible to use bespoke markers that do not resemble the "Hiro" marker like below. Could I potentially use a random shape (a solid red oval for example) as a marker?  </p>
  
  <p>If this is not currently supported, could someone point me into the right direction to where I might start building this functionality?</p>
  
  <p><a href="https://i.stack.imgur.com/5cahN.png" rel="noreferrer"><img src="https://i.stack.imgur.com/5cahN.png" alt="enter image description here"></a></p>