Search this forum for "gestures" and download demo from PEPv2 download page link.

Link is sort of hidden under the 'Text Properties' in release notes of latest PEPV2...

ProntoScript:
Dynamic user interface; PEP2.4 brings improved dynamic graphic (dynamic widgets) and text property control, adjustment and object manipulation through improvements to ProntoScript.
Gestures; Using ProntoScript it is now possible to implement gestures to your Pronto user interface.
Text is now more dynamical as the following text properties can now be changed in ProntoScript: color, font type, font size, bold, italic, alignment.
An example of manipulation of these widget properties can be downloaded here.