In an input control device for use with an electric typewriter, word processor or computer, provided are a special back key which inputs the command for moving a visual indicator in a direction toward the beginning of a line of data, and a special advance key which inputs the command for moving the indicator in a direction toward the end of the line. With the special back key depressed, the indicator is moved to the beginning of the line when the indicator is within a data string and to the end of data string when the indicator is outside the data string. With the special advance key depressed, the indicator is moved to the end of the data string when the indicator is positioned within the data string except at the end of the data string and to the end of the line when the indicator is outside the data string except at the end of the data string.