... have relevant certificate of patent6,magic eraserStandard geometric graphics1.support to draw standard geometric graphics directly and user-defined polygon. ... pictures of jpg,png,bmp,PDF, TIFF,PPT,HTMLInsert geometric toolsCould insert geometric tools, such as ruler, protractor, compasses, which ... the thickness of the pen 5.color fill the geometric figures in user-defined colors.6.move: move the whole ...