Suppose we have these windows, how do we navigate them?
(0) - 0: 3 windows (attached)
(1) ├─> 0: code-
(2) ├─> 1: build
(3) └─> 2: readme*ctrl+b n switches to the next window
ctrl+b p switches to the previous window
ctrl+b l switches to the last used window
ctrl+b window_number switches to the windows_number, which is the 0-based order under the session (e.g., ctrl+b 0 switches to the first window)