window next

This swaps the current window with the next higher numbered hidden window. Windows are numbers sequentially, so if the current window is 2, this command will look for the lowest hidden window refnum greater than 2. If there is no hidden window with a greater refnum, it will wrap around and use the lowest hidden window refnum.

This always swaps windows. So if you do not have a hidden window, then it will fail with the error “There are no hidden windows”

This is the command that underlies the swap_next_window keybinding.

If you want to cycle through your visible windows, use the next_window keybinding.