Annotations in Kindle Fire

My wife would like to delete all her annotations in her Kindle Fire Gospel Library. Is there a way to delete all of them at one time, or does she need to delete each annotation individually?

Thanks

You can only delete annotations one at a time. If she has logged into the app with her lds account though, the annotations would be synced to lds.org and it may be easier to log into the notes and journal section and delete the annotations from there.