Leveraging the pen and touch input paradigm
Many basic operations can be carried out through triedand-true interactions governed by the appropriate modality. These include common manipulations such as
panning, zooming, rotating etc. with multitouch and
inking with the pen. We will present a few other unimodal gestures that we utilise in our application later
on, but first we would like to introduce the concept of
modifier postures as a functional equivalent to modifier
keys on a keyboard.