<span>Registration: A method of correlating color separation so that the colors line up correctly. Press: A device used to transfer an image. Keyblock: A printing block that is used to create a black outline before the color is added, and usually has the most detail.</span>
This type of weaving is called "Fancy", but also "Classic Tartan" or "Veronica".
Answer:
I think digital artists often begin by sketching their ideas on paper so if they change their mind, it would be a lot easier to mess up the paper instead of the computer. Also, by using paper, digital artists can plan out their ideas and draw it on the computer later.