1. A method, comprising: at a portable electronic device with a touch screen display: in a first area of the touch screen display, displaying a current character string being input by a user with the keyboard; in a second area of the touch screen display that is between the first area and the keyboard, displaying the current character string or a portion thereof and a suggested replacement character string for the current character string on opposite sides of the second area; replacing the current character string in the first area with the suggested replacement character string if the user activates a space bar key on the keyboard; replacing the current character string in the first area with the suggested replacement character string if the user performs a first gesture on the suggested replacement character string displayed in the second area; and keeping the current character string in the first area and adding a space if the user performs a second gesture in the second area on the current character string or the portion thereof displayed in the second area.