To comment on a teammate’s check-in, just click the “Comment” link underneath their update. Use comments to encourage, congratulate, or ask for clarification.
Configurable notifications are sent to the check-in author every time someone comments. Like reactions, the notifications are delayed for a few moments just in case you reacted accidentally. You can remove the comment by clicking the “X” in the upper right corner.
Note: Check-in comments are available in Pro and Corporate plans only. If you are subscribed to the Basic plan, you will need to upgrade to use check-in comments.