Graphite Community

it's available if you click + drag down lines, like on Github

Ah, thanks.
It's not "like on GitHub" though, but "like one way to do it on GitHub" that I was not aware of. :smile:
On GitHub I click on the first line, then Shift+Click on the last line to select multiple lines and then create a multi-line comment by clicking on the plus button.

I was neither aware that you can select multiple lines by d&amp;d on the line number, nor that you can comment on multiple lines by d&amp;d on the plus button.