1. A method, comprising: receiving, with a text entry device, text input comprising one or more words, wherein at least a portion of the text input is displayed on a touch screen; receiving first touch screen input from the touch screen to select at least one of the words; based on the first touch screen input, selecting at least one of the words and displaying one or more suggestion candidates related to the at least one selected word, at least one of the suggestion candidates including the at least one selected word, the displaying including: displaying the at least one selected word within a shape designating an area of the touch screen as a button, and displaying an add-to-dictionary indicator within the button shape; receiving a second single touch screen input from the touch screen over a selected one of the suggestion candidates that includes the at least one selected word; and based on the receiving the second touch screen input, adding the at least one selected word associated with the selected suggestion candidate to a candidate source.