You can add comments to segments during translation/editing.
How to add
1. Find the segment, click the icon in the Actions column on the right and a pop up shown below will show up.
2. Enter comments in the text box and click Add.
After the comment is added, the icon will change from to. Click the icon, and then you can view the details, including Time, From and Comments.
3. You can click Edit in the column to change comments and then click save, You can also click Delete to delete your comments.
How to view
1. You can click Comments on the right to check the comments of a segment.
2. You can also directly click the icon in the Actions column to view comments and meanwhile edit.