Document use of the Live View

[olberger]

It seems that the Live View used to be rendered internally in an editor pane, and would nowadays be done using an external Web browser, connecting to http://127.0.0.1:9025/ AFAIU

Still as many screenshots of the ancien behaviour still float around, this is a bit disturbing.

Could you document the "Live View" feature a bit more to explain that upfront ?

Thanks in advance.