Answering old question where the answer was commented
7768
What should be done with questions that have been resolved as a comment instead of an answer?
98110
Show if/when the answer was seen by the author of the question
76231
How to get a new answer for an old question
33698
Editing old questions
19629
Where is it preferred to place the answer to duplicate questions?
108648
Can I "tip" someone who left a good comment on my answer?
154418
Is it possible to search for posts where the OP self-answered?
51469
Allow converting comments to answers
34508
Notify us when the question has been edited after posting an answer
142065
Finding Questions with the Newest Answers anywhere on Site?
25105
Suggestion phrased as a question
59330
Mark an answer for a question from a deleted account
69552
Unanswered Question - Answered in comments
80592
Sharing reputation for good comments that contribute to the quality of the answer
83537
Add an answer to the question with many existing answers already
128221
Promoting comments to answers
87380
What to do when the correct answer to a question changes over time?