For those that don't know about them: Comment shortcuts are handy
40702
Add data.SE style "magic links" to comments
18127
Keyboard shortcuts are now integrated into the site
83927
Are comments safely hidden once the document is compiled?
25896
What is the black box around a post when using the comment keyboard shortcut (c)?
154006
Allow linking (suggested) edits to one comment
18725
Multiline Comment Workarounds?
8000
How do comments work?
24412
"Leave a comment" link even when you can't
158765
Tab name completion for comments please!
93751
Moving comments to chat: is it just about length?
32317
Code Formating in Comments
120108
Commenting interpreted code and performance
57369
Automatic "fancy" comment insertion with Vim
105916
Auto-expand @username in comments to keep the username up-to-date
15279
Implement a Selective Comment Ban
1163
Comments in Markdown
108901
Denoting keyboard shortcuts in Stack Exchange posts