Overview
This article explains (part of) how to use the annotation interface in IIIF Mirador 2.
Creating Rectangle Annotations
https://www.youtube.com/watch?v=jny09nLZvLU
Creating Path (Polygon) Annotations
To finish an annotation, double-click.
https://www.youtube.com/watch?v=4cM-6-rXL9M
Editing Existing Annotations
https://www.youtube.com/watch?v=HlE36inbgq4
Deleting Existing Annotations
https://www.youtube.com/watch?v=STk2vjLc_-k
Summary
I hope this is helpful when creating annotations using IIIF Mirador 2.