The topic has now a reply.
A new topic to test : Cuvillier dans CRI-CRI de 1937 (intégral) - Maurice Cuvillier - Wikibulles
Here the “end” key works well.
I had not tried using keybord before in this case 
But sometime one need to maintain hand on the mouse, so a button or other availability would be wellcome (ie as shown on my printscreen) …
It would be intuitive