You can find all of your existing Annotations on the Annotate page in Portal:
To quickly grab the URL of your Annotation, simply click on the link under the "URL" tab and it will automatically copy it to your clipboard:
I lost my Annotation URL. Where can I find my Annotation URL?
You can find all of your existing Annotations on the Annotate page in Portal:
To quickly grab the URL of your Annotation, simply click on the link under the "URL" tab and it will automatically copy it to your clipboard: