A window in tmux is similar to tabs in a web browser or text editor. To create one, make sure you open a tmux session first by typing tmux. When you do that, you’ll be in the first window of that session. Press ctrl+b then w, you will see the following window listing:
(0) - 0: 1 windows (attached)
(1) └─> 0: [tmux]*The result above means there’s one session and one window under that session. The asterisk means the current window. Exit the listing with esc.
Create a new window with ctrl+b then c. Then list all the windows.
(0) - 0: 2 windows (attached)
(1) ├─> 0: zsh-
(2) └─> 1: [tmux]*Now, the current session has two windows.