Due to its enormously awesome size, the Samsung Galaxy Note 2 usually takes two hands to maneuver through photos and texts, write emails, and get directions on the map.
Even simple tasks like zooming in and out require a couple hands; one to hold the device and one to do the zooming. If you're extremely flexible, you might be fine using only one hand for zooming, but consider yourself lucky.
Still, whether you have one hand or two hands on the device, you're still going to use a minimum of two fingers to pinch to zoom. However, there is a way to only use one finger, which helps us less... more