It is possible to leave a comment for a card. To do so, right click any card and click on "add comment". Project user members will get a small "new" marker to indicate whether new comments have been added to a card. To view card's comment list, hover your mouse over a card and click the comment link on the card's footer.
not clear how to edit a comment
ReplyDeletethere is no possibility at this moment, apart from deleting and recreating a comment. we will add it as a feature request.
ReplyDelete