what is the meaning of elements of design
Visual design elements and principles Design elements are the basic units of any visual design which form its structure and convey visual messages.[2][3] Painter and design theorist Maitland E. Graves (1902-1978), who attempted to gestate the fundamental principles of aesthetic order in visual design,[4] in his book, The Art of Color and Design (1941), defined the elements of design as Line, Direction, Shape, Size, Texture, Value, and Color (in that order), concluding that "these elements are the materials from which all designs are built."[5]
In situ In chemistry, in situ typically means "in the reaction mixture."
Usability ISO defines usability as "The extent to which a product can be used by specified users to achieve specified goals with effectiveness, efficiency, and satisfaction in a specified context of use." The word "usability" also refers to methods for improving ease-of-use during the design process. Usability consultant Jakob Nielsen and computer science professor Ben Shneiderman have written (separately) about a framework of system acceptability, where usability is a part of "usefulness" and is composed of:[7]
Composition (visual arts) In the visual arts, composition is the placement or arrangement of visual elements or 'ingredients' in a work of art, as distinct from the subject. It can also be thought of as the organization of the elements of art according to the principles of art.