Data visualisation. Much of my recent research has focused on algorithms for automatic diagram layout, particularly networks, but I am also interested in developing new visual representations, usability and understanding what makes a particular visualization effective. 

Immersive analytics. A new direction is to explore how emerging mixed reality display and interaction technologies can be used to enhance data understanding and decision making.

Human-in-the-loop optimisation. For a number of years I have been interested in how we can open the tradiotional black-box model for optimisation and more directly engage the user in the optimisation process.

Digital documents. Here I am investigating how to best move from a print-based view of documents and their content to one that takes more advantage of the capabilities of electronic media. We want to provide the technology for creating interactive documents and diagrams whose appearance adapts to their viewing environment and to user requirements.

Accessible graphics. I am exploring how new technologies like 3D printing or tablets can be used to present graphical content to people who are blind or vision-impaired.

Cognition of visual languages and information graphics. I am interested in how humans comprehend and reason with two-dimensional visual languages such as mathematics, finite state diagrams or house plans.