The cdr file is a specific format of CorelDraw software; graphics produced using CorelDraw software are saved in the format of .cdr file. When opening a cdr file, it is usually opened with CorelDraw software. cdr material is a picture material with vector effects produced by CorelDraw. Its characteristic is that it will not be distorted as the picture becomes larger or smaller, thus bringing great convenience to designers. CorelDraw has a user-friendly interface design and sophisticated operation. It provides designers with a complete set of drawing tools, including circles, rectangles, polygons, squares, and spirals. Together with shaping tools, it can make more changes to various basic shapes, such as rounded rectangles, arcs, sectors, Star etc. At the same time, special brushes such as pressure pens, writing pens, sprayers, etc. are also provided to make full use of the computer's large amount of information processing and high random control capabilities. CorelDraw is a flat layout vector drawing software. It can be used for corporate VI design, poster design, advertising design, packaging box design, packaging bag design, etc. CorelDraw includes two drawing applications: one for vector graphics and page design , one for image editing, allowing users to create a variety of dynamic special effects and bitmap image real-time effects in simple operations.