Rough drawing, quick drawing, rapid drawing, and sketch mean the same thing.It's a way of drawing quickly to capture ideas, gestures, or scenes on paper or digital medium for reference or as basis of detailed drawing. It does not require realism, color, or details.Outline is the shape of the subject. It is the combination of points, lines, and curves which are elements of Line Art or Line Drawing.Line Art is a style of finished drawing that uses lines and solid areas set against a background; usually black ink on white paper. Line art is not filled in with color or shading. It can be described as a Black & White drawing.Common examples of line art are coloring books, comic strips, and manga comics.