more simple hand shapes occurs. Additional symbols are used to represent sign locations at the face or body parts other than the hands. A circle shows the head. Expression There are symbols to represent facial movements that are used in various sign languages, including eyes, eyebrows, nose movements, cheeks, mouth movements, and breathing changes. The direction of head movement and eyegaze can also be shown. Body movement Shoulders are shown with a horizontal line. Small arrows can be added to show shoulder and torso movement. Arms and even legs can be added if necessary. Prosody There are also symbols that indicate speed of movement, whether movement is simultaneous or alternating, and punctuation. Punctuation Various punctuation symbols exist that correspond to commas, periods, question and exclamation marks, and other punctuation symbols of other scripts. These are written between signs, and lines do not break between a sign and its following punctuation symbol. Arrangement of symbols One of the unusual characteristics of SignWriting is its use of two-dimensional layout within an invisible 'sign box'. The relative positions of the symbols within the box iconically represent the locations of the hands and other parts of the body involved in the sign being represented. As such, there is no obvious linear relationship between the symbols within each sign box, unlike the sequence of characters within each word in most scripts for spoken languages. This is also unlike other sign language scripts which arrange symbols linearly as in spoken languages. However, since in sign languages many phonetic parameters are articulated simultaneously, these other scripts require arbitrary conventions for specifying the order of different parameters of handshape, location, motion, etc. Although SignWriting does have conventions for how symbols are to be arranged relative to each other within a sign, the two-dimensional layout results in less arbitrariness and more iconicity than other sign language scripts. Outside of each sign, however, the script is linear, reflecting the temporal order of signs. Signs are most commonly now written in vertical columns (although formerly they were written horizontally). Sign boxes are arranged from top to bottom within the column, interspersed with punctuation symbols, and the columns progress left to right across the page. Within a column, signs may be written down the center or shifted left or right in 'lanes' to indicate side-to-side shifts of the body. Sequencing of signs in dictionaries Sutton orders signs in ten groups based on