See all desktops on multiple displays

[HalfNelson]

One of my only issues with how MacOS handles multi display setups, is that I have no way to see the desktops on another display, unless that other display is on. Say I have Display #1 and it has desktops 1-5, and display #2 task desktops 6-10. If I'm working on display #2, and have Display #1 switched to a different input, I have no way of seeing those other desktops, and pulling them over to display #2 if I need to work on them. Back before Mission Control, when there was Expose and Spaces as two separate features, I could see my desktops across all displays. I really miss that capability and was wondering if there is any way to get that back. I know I can uncheck the "displays have separate spaces" box, but then that neuters my second display, if I want to go full screen on the first, and vice versa. Thanks in advance for any/all help.