Thankfully, there's a helpful option to disable the background and replace it with a yellow sticky-note backdrop. (You can also save and share these jottings, of course.) Basically, the company's crafted this as a shortcut, albeit a convoluted one, that's meant to bypass the lack of any function keys on the actual stylus.
ENGADGET: LG Optimus Vu review: a 5-inch, pen-enabled phone to take on the Galaxy Note