1. A method comprising: identifying in a first electronic message a plurality of word groups that satisfy at least one criterion, each word group comprising at least one word; for each word group that satisfies the at least one criterion, automatically selecting, using a processor, from a plurality of images at least a first image corresponding to a meaning of the word group; and presenting, in a tree structure, the first electronic message in text format and each image selected for each respective word group that satisfies the at least one criterion, the tree structure presenting each selected image below text of the first electronic message and the tree structure indicating that each selected image corresponds to the first electronic message.