It took me ... a long time to find that. And I am much more keyboard-driven than mouse. Just being able to hit 'u' is awesome.

Other control keybindings often interfere with windowmanger bindings I've been using for well over a decade. The number of competing sets of controls when you start embedding viewers in apps in webpages in browsers in window managers is pretty bad.

What about ctrl+shift+T ?

Or I misunderstand what you're talking about.

I've got that hotkey mapped to another function in my window manager.