Reply to comment button
9269
Let's make it easier to reply within comments!
58272
I cannot respond to comments on my own question (no "add a comment" link anywhere)
13484
Is it acceptable to write a thank you in a comment?
144201
Can I place  in a comment?
120030
Add button to watch questions/get notified on edits, comments, etc
99592
Email subscription to a given question answers *and* comments?
8000
How do comments work?
48650
Highlight comments from answer author, in addition to question author
117284
Is there a way to enable commenting adobe PDF?
1163
Comments in Markdown
152270
Answering comment-answered questions
9626
Formatting Keyboard Shortcuts for Comments
58991
How do I enable comments for user profiles?
26712
How about newlines within comments?
122243
When to answer vs when to just comment
128221
Promoting comments to answers
18725
Multiline Comment Workarounds?