Is there any way that we can add comments to the dashboard panel to give more information for easy understanding. For example: If there’s any jump in the trend from previous month to this month. I need to put a comment box and explain why the jump happened.
In SimpleXML, you could have a html panel with your comment. You could then make this panel depends on the existence of a token. You could then set or unset this token depending on a result from your dashboard panel search
I'm not sure where you want that comment. SimpleXML, as XML allows for a comment with a normal <!-- something -->
Dashboard studio source however is a json file and json has no concept of a comment so unless there is no explicitly defined comment property (and I think I recall some discussion with a conclusion that there isn't), you can't insert it there.