At an electronic device, detect a first input on the touch-sensitive surface that represents selection of a first ideogram. Identify at least one attribute of the first ideogram. Select a plurality of suggested one or more characters to display, where at least a first set of suggested one or more characters is selected based on a set of selection criteria, the set of selection criteria including the identified at least one attribute of the first ideogram. Display at least the first set of suggested one or more characters. Detect a second input on the touch-sensitive surface that represents selection of the displayed first set of suggested one or more characters. In response to detecting the second input, displaying a composed electronic message, the composed electronic message including the first ideogram and the selected first set of suggested one or more characters.