Add a 'context' button to the bottom of comments (if they aren't top-level comments) which links to the parent comment.
This is especially important in views of threads that are portions of comment trees, and also in the user/comments view, and the messages/notifications view.
Oh, that's not very intuitive, since you have to click on the parent's permalink to get the context, and it's not what one expects it to do. It does save a button.
Add a 'context' button to the bottom of comments (if they aren't top-level comments) which links to the parent comment.
This is especially important in views of threads that are portions of comment trees, and also in the user/comments view, and the messages/notifications view.