Use color to speed visual search. Color coding often speeds up visual search. ... Use color to improve object recognition. ... Use color to enhance meaning. ... Use color to convey structure. ... Use color to establish identity. ... Use color for symbolism. ... Use color to improve usability. ... Use color to communicate mood.
A pen is a common writing instrument used to apply ink to a surface, usually paper, for writing or drawing. It has a mechanism by which ink is made to flow through the tip of the writing instrument in the way it is scribbled onto the surface. Pen is the most important thing which a literate person possess. It is the device which makes possible to note down our thoughts in a piece of paper.