Let's say I have a two monitor setup.
I open Firefox on display #1. If I hover my mouse to select a menu item on display #1, the global menu will show. But if I hover the mouse to select a menu item on display #2 nothing will show, unless I move the Firefox window to the second display. But then the global menu will not show on display #1.
Can I make the global menu show on all displays, no matter on which display the application is visble?
Please note that I do not want to disable the auto-hide feature.
Edit: Adding a reason on why I need this:
One of the reasons I ask for this, is because I regularly connect my laptop to my TV Set and watch movies (I use VLC). So, most of the times I want to access the menu of VLC without the need of interrupting the playback.
And even if I did interrupt the playback, VLC's playlist can be undocked from the main window, and become a window on its own.
So I always keep the playlist on the laptop display, and the movie on full screen on the TV display. And even if the playlist is the active window, since VLC's main window is on the TV display, the menu would only show on the TV display, and not on the laptop.
Best Answer
No, you can't (only if someone will make an application/program to do so or if you select Mirror displays in System settings > Hardware > Displays). The thing you're asking is inconsistent.
Think that you have one application (Firefox) opened on the display #1 and another one (let say Chromium) on the display #2. Now, you look at the display #2, so you use Chromium and you will see in global menu the menu for Chromium. What reason do you have now to see in global menu the menu for Firefox that is displayed on display #1? And vice versa. This makes no sense...