This paper investigates an interactive approach where users can help a system to produce nice drawings of directed graphs
by giving hints to graph drawing algorithms. Hints can be three kinds of operations: focus on a specific part of the drawing
that needs improvement, insertion of layout constraints, and manual changes of the drawing. These hints help the system to
escape from local minima, reduce the size of the solution space to be explored, and input domain knowledge. The overall aim
is to produce high quality drawings. We present a system based on this approach and a pilot study involving human tests.
Lecturer of the Inst. of Informatics, UFG-Brazil. PhD scholarship of CAPES-Brazil.
Supported by the Australian Research Council.