Gestures are a powerful way to specify both objects and operations with a single mark of a stylus or mouse. We have extended an existing user interface toolkit to support gestures...
This paper describes some recent experiments that assess user behavior in a multi-modal environment in which actions can be performed with equivalent effect in speech, keyboard or...
The object-oriented history mechanism of the GINA application framework and its relevance for multi-user applications are demonstrated. The interaction history of a document is re...
Considering that direct manipulation interfaces using a pointing device could be more efficient with the addition of a second pointing device, we are designing and implementing tw...