Welcome by the way
To turn them back out, turn the dial 180 degrees back to the bottom.
The windows can be opened by pressing the unlock button on the central locking key, so just hold it and the windows go down till you stop holding it and you can open it at any height you want. And for closing them when out of the car, hold the lock button and they go back up!
Great use for in the summer to leave a small gap.