In the markdown demo, on my mac (which since died), ctrl-click brought the tooltip menu, on a linux box it does not. In emacs, ctrl-click still gives a contextmenu. I don’t know yet the prosemirror internal event handling and did not find alternate way of getting a tooltip menu. Comments ? Using ubuntu and xfce, if that matters. Thx for your attention.
You should be able to open the tooltip menu by opening the browser’s context menu, which is done with a right click on Linux.
forgot to say that I am using a touchpad. That’s why I am talking of ctrl-click instead of right click