Preview
To have an overview of your already added annotations, you can always click on the table icon at the top to open a table which has all the annotations with their keys, terms and values.
In the preview, you can also delete individual annotations in the right column.
This helps me a lot keeping an overview of what I already annotated and I can also quickly delete those.
Under “Help” in the navigation bar you find a short form of this documentation with pictures and under “Contact” you can write issues on the GitHub repository if you find any bugs or want to suggest ideas for BOAT.