I think you have to use the “Other payment methods” thingy at “3. Payment method”
Or activate PayPal, buy and don’t pay with PayPal, the order is still there but not paid
Mmmm sorry forget about that 
I have been searching for the answer for some time when i decided to ask the forum but just after sending my previous post i tried an other keywords combination that got me the answer.
Sorry again
Edit : and thank you L4M4 you were FAST !