King, Mike2014-10-212014-10-2119951467-8659https://doi.org/10.1111/j.1467-8659.1995.cgf143-0043.xDoes the modern commercial Graphical User Interface constrain the developer of graphics applications into certain interaction styles? This paper looks at the Microsoft Windows environment as an example, with particular reference to the question of interaction modes, screen real-estate and visual appearance. The concept of syntax channelling is introduced to help analyse the problem of modality, and the question of button-down versus button-up dragging is debated in the context of a range of commercial applications, and possible consequences for upper limb disorder. A Windows application developed by the author involving the implementation of a variety of innovative interfacing techniques is presented.10.1111/j.1467-8659.1995.cgf143-0043.x43-54