How to turn on the keyboard on the lenovo thinkpad x61 when it is in tablet format?

I just purchased a Lenovo Thinkpad x61 (refurbished) and I was told that I could use it in tablet format. I figured out how to set it up so that the screen is sitting on top of the keyboard (hiding the keyboard) but I can't figure out how to turn the keyboard on the screen., I've tried looking it up online but could not find anything. Also, does anyone know if there's a phone number that I can call to register my warranty. Thanks for any and all help you can give me. I'm EXTREMELY frustrated at this point and any help would be greatly appreciated.

User manual is there along with anything else you will need for it. When looking for info on a unit, type in the word "support" and the manufacturers name along with the model number. Found the lenovo page right away by typing that into google.

http://support.lenovo.com/...tor=expand