I see some of our in-house bi/visualization tool built with PHP has a functionality that enables a user to annotate charts, for example, if there is a uptick or drop from a certain threshold, the user can annotate as they find/comment on it. How do we achieve it in looker?
I don’t think there’s this feature but you can go around and do this! One article written by Looker staff, Zachary Michel, wrote a very detailed post regarding “Displaying values from other fields in the tooltip”. Check it out at Displaying values from other fields in the tooltip.
Hope this helps!
If you want to write a side comment, you can do so in the dashboard.
What are the technical hurdles (impractical or so) in achieving it in the current or future release? If you could reflect a bit more.