But Ctrl+Y is what I use to scroll up in vim! Ultimately I think all ctrl combinations were taken long before tmux came around, you just set it to the one that

But Ctrl+Y is what I use to scroll up in vim! Ultimately I think all ctrl combinations were taken long before tmux came around, you just set it to the one that annoys you less. Ctrl+a seems to be a popular choice. I personally just leave it on the default.