The type of illustrations most often used in technical documents are vector graphics, these are generated in a software package such as Adobe illustrator and can be resized without loss of quality.
Scalable vector graphics
We use vector graphics for illustrations such as the remote control shown here. One of the advantages of this method is that scaling the vector does not blur the image, another advantage is that we can pick out details from the illustration to help further explain product usage or make a specific point.
