Windows Surface Book 2

Hello,

I wanted to buy a Surface Book 2 this week, but still have a question.

If you undock the screen from the keyboard and only want to use the screen as a tablet, how do I type in the keyboard if I undock the keyboard?

Is there something like an on-screen keyboard like normal tablets?

If so, how can I use it?

I know that I have a lot of questions, but I really want to be sure before I buy the Surface Book 2.

Many thanks in advance.