Google has released an update to its native Gmail app for iOS adding several new features including support for nested labels, mobile signatures and vacation messages, and a new “scribbles” feature. With Gmail 1.1 nested labels now appear laid out properly in the left-hand labels view and users can configure Mobile Signature and Vacation Responder settings directly from their device by clicking on a small gear settings icon at the top of the menu view. The update also adds a new notification sound for iOS 5 devices to help users distinguish Gmail notifications from other iOS notifications. The update also adds a new feature dubbed “scribbles” that allows users to open up a canvas to draw a message using the touchscreen that will be attached to an e-mail. Scribbles provides multiple colours, brush sizes, lines, erasers and spray paint and can also be accessed from the HTML5 Gmail web app. Gmail 1.1 is available from the App Store as a free download.