[Docs] What is the default behavior?

[lonix1]

The docs show

Automatic tmux start Tmux is automatically started after the computer/server is turned on. See the instructions how to enable this for your system.

and

Automatic restore Last saved environment is automatically restored when tmux is started. Put set -g @continuum-restore 'on' in .tmux.conf to enable this.

I don't understand - are these features enabled as written in the first lines, or should I manually enable them as written in the second lines?