This function enables users to log in and give comments on specific questions.
If the comment is considered as the best answer for the question, it can be promoted to the answer.
Leave a comment
1. Follow one of the following two ways:
The first way
Click the question you want to leave comments, then select
.
The second way
Right-click a specific question, then select
from the drop-down menu.
2. Enter your comment in the text-input field.
3. Click Save to finish.
Promote a comment as answer
Simply click 
on the top right of the comments panel.
Note
Comments can be written in different languages. However, you can only put comments on a question in multiple languages only when the question has been posted in multiple languages.