Make clear when the comment comes from the question's OP
56835
You can't see the question owner's special color
104116
How can I know if my post(comment, answer, question) was Flagged?
30736
Is it ok to tell the OP to accept an upvoted answer?
144201
Can I place  in a comment?
48650
Highlight comments from answer author, in addition to question author
108648
Can I "tip" someone who left a good comment on my answer?
23324
Add "Your Question has been posted" notification
128234
Asking for more information on a question or answer
44876
Answer appears automatically converted as a comment
1334
Adding a comment should not make me fail the review audit
147652
Get a notification when new answers are added to other people's question
31058
Responding to a poor question
37700
How can I ask for clarification on a question I'd like to answer if I can't add comments?
14173
Show original question during editing a question
7768
What should be done with questions that have been resolved as a comment instead of an answer?
19115
Mark a comment as the answer to a question
92948
Allow Comments on Deleted Answers