Switch to next pane
panes
// what it does
Ctrl+b o cycles focus to the next pane in numerical order, wrapping back to the first after the last. Unlike the arrow-key selection, it ignores layout geometry and just walks the pane index. Handy for quickly rotating through every pane in sequence.
// shortcut
Ctrl + bo
// gotcha
It cycles by pane index, not screen position, so the "next" pane can jump across the window in a non-obvious order. Don't confuse it with Ctrl+b ; which instead toggles to the last active pane.