The most representative phase from the point of view of our subject is computer-aided design. Commonly known as CAD for computer-aided design, it is the use of computers to assist in the creation, modelling modification, analysis or optimization of a design. CAD software is used to increase the productivity of the designer and improve the quality of the design. These programs are presented in the form of electronic files. Most popular Image formats files are:

• png (portable network graphics),PNG supports lossless compression, maintaining detail and contrast between colors. In particular, PNG offers much better text readability than JPEG.

• jpeg (Joint Photographic Experts Group)It is the most common format, JPEG compression may cause some loss of quality in the picture. 

• bmp (Bitmap) developed for Windows the image does not lose quality  can be edited later they are large files

• dwg. (Drawing)This is Autocad software extension, includes 2D and 3D pictures. It contains the drawing information as lines, geometric data, photos....

• dxf (Drawing Exchange Format) DXF is a interchange format for CAD programs.  It works in all CAD programs 

These tools can be basically divided into 2D, 3D drawing and 3D modelling programs. 

• 2D CAD softwares, have drawing tools are based on vector geometric entities such as points, lines, arcs and polygons, with which you can operate  using a graphical interface or command line. 

• 3D CAD programs add volume, solid surfaces, textures... These programs offer realistic dynamical animations of the virutal prototypes and can be applied3D printing technology. 

• Modelling software, apart of 3D design, three-dimensional models can be used in simulation animation studies to predict how the object will respond to mechanical or resistance test, structural calculations, lighting, motion, environmental factors etc, in short the behaviour of the element itself in use.

Graphic design can also be used to design characters and use them in movie animation, simulations,

Some programs that we will see are: Tinkercad, SketchUp, Blender, Librecad...