I started using Byobu with tmux for sessions on my various machines, and overall I have to say I’m really impressed. It’s an awesome addition to the arsenal, but if you’re not super familiar with some of tmux’s finer points, byobu can really fuck with your head.

I noticed that disabling the “F-Keys” in byobu gives you access to F1-F11, but F12 is still fucked. That’s because it’s added as a second prefix. On the fly you can fix it with: