... to the nature of the task and the form of the experimental materials Students said that they found the diagrams easier to understand if, when reading from top to bottom, the order of the classes ... (2002): Graph drawing aesthetics metrics Journal of Visual Languages and Computing to appear PURCHASE, H., ALLDER, J and CARRINGTON, D (2000): User preference of graph layout aesthetics: A UML study ... 1984, Gansner and North 1998)) UML class diagrams UML class diagrams are used to describe the static view of an application (Rumbaugh et al 1999): the main constituents are classes and their relationships...