I’ve some information for people searching for help:
The URL for picture file, should be placed in the “grafana user” directory, for instance, in Ubuntu it’s /usr/share/grafana.
And a good place is /usr/share/grafana/public/img/your_picture.png, and use “/public/img/your_picture.png” for the “Picture URL” field.
Second, I didn’t understand how to “select” the value to display…
For instance, my search is something like:
Should I use “tcp_bits_per_second” as the value for the “metric” field?