A : This features is a shortcut to going to the screen and tapping on the '+' button.
iPhone / iPod: From the main screen hold your finger on any of the timer icons at the top of the screen.
iPad Only: Hold your finger on any of the timer / entry icons on the left and the corresponding screen will appear so you can quickly save a manual entry. This also works great when you are in the Sleep screen and you just changed a diaper. No need to leave the sleep screen.