The present work attempts to partially fill this relative
void by providing intuitive and efficient tools to support
document creation and editing on digital tabletops. We
are creating a prototype application with a UI that follows a loose virtual desk metaphor. This UI is supported by a rich gesture set making use of combined pen
and touch input, in particular pen-mode switching activated by postures of the non-dominant hand (i.e. the
hand not holding the pen), which we call modifier postures in analogy with modifier keys on the keyboard.
We describe these tools and gestures after a brief review of relevant prior work.