Computer technology-based PPT is usually conceived as a tool for information transmission and presentation rather than as a type of discourse. Much focus of the previous study on PPT is concerned with its development, design and application. However, PPT itself may actually be regarded as a multimodal discourse comprising multisemiotics, such as linguistic signs, image, graph, sound, color and their interrelated layouts, etc.. So the article attempts to make a multimodal analysis of College English PPT discourse via the principle of reading images by Kress and van Leeuwen in 1996, aiming to present a different angle of interpreting the meaning of composition anchored in PPT.
