Avaz uses the Symbostix library of images for the picture mode. The Symbolstix library has a rich content of 14,000+ symbols, of which there are approximately 600 symbols to denote Sign Language and you can use any of these symbols as images in Avaz. 

E.g. here are some examples

                        Close                                 Friend                                     More                                     Stop                              Thank you               


Click here to see How to add image or change the image