1: you can draw on the writing board and then connect to eDraw. The content will be uploaded to eDraw in real time. 2:eDraw supports offline mode. When you have saved your own works in writing board alone, you only need to open eDraw and choose to upload historical works to synchronize your offline works. 3:eDraw supports historical track playback, and the whole process you draw can be recorded. 4:eDraw provides a rich color selection mechanism, allowing users to choose their own colors at will; 5:eDraw supports photo-mode drawing, which can transform the photographed images into black and white.