Desain, P. (1986). Tree Doctor: a software package for graphical manipulation and animation of tree structures. In G. Mulder, & G. v. d. Veer (eds.), Human Computer Interaction: Psychonomic Aspects. Berlin: Springer.

Abstract

A system is presented for graphically editing, manipulating and animating formal tree structures. The central design consideration was the choice of direct manipulation as the basic user interface method. Functions and components of the package are explained and illustrated. A few possible applications are outlined.

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